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From: <mohamed.boucadair@orange.com>
To: kaname nishizuka <kaname@nttv6.jp>, Jon Shallow <supjps-ietf@jpshallow.com>, "dots@ietf.org" <dots@ietf.org>
Thread-Topic: [Dots] clarification questions from the hackathon
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Date: Mon, 1 Apr 2019 07:04:24 +0000
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Subject: Re: [Dots] clarification questions from the hackathon
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From: <mohamed.boucadair@orange.com>
To: Jon Shallow <supjps-ietf@jpshallow.com>, kaname nishizuka <kaname@nttv6.jp>, "dots@ietf.org" <dots@ietf.org>
Thread-Topic: [Dots] clarification questions from the hackathon
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Date: Mon, 1 Apr 2019 11:13:07 +0000
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Subject: Re: [Dots] clarification questions from the hackathon
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From nobody Mon Apr  1 04:26:54 2019
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From: "Jon Shallow" <supjps-ietf@jpshallow.com>
To: <mohamed.boucadair@orange.com>, "kaname nishizuka" <kaname@nttv6.jp>, <dots@ietf.org>
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Date: Mon, 1 Apr 2019 12:26:44 +0100
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Archived-At: <https://mailarchive.ietf.org/arch/msg/dots/zOwMlA0HPWLU9DYy0MAGq9pJI4E>
Subject: Re: [Dots] clarification questions from the hackathon
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Hi Med,

Changes look good to me - thanks.

Regards

Jon

> -----Original Message-----
> From: Dots [mailto: dots-bounces@ietf.org] On Behalf Of=20
mohamed.boucadair@orange.com
> Sent: 01 April 2019 12:13
> To: Jon Shallow; kaname nishizuka; dots@ietf.org
> Subject: Re: [Dots] clarification questions from the hackathon
>=20
> Jon, Kaname, all,
>=20
> FWIW, a proposal to integrate the interop comments is available at:
> https://github.com/boucadair/filter-control/blob/master/wdiff%20draft-
> =
nishizuka-dots-signal-control-filtering-05.txt%20draft-nishizuka-dots-sig=
nal-
> control-filtering-06.pdf
>=20
> Cheers,
> Med
>=20
> > > >
> > > > > -----Message d'origine-----
> > > > > De : Dots [mailto:dots-bounces@ietf.org] De la part de kaname
> nishizuka
> > > > > Envoy=C3=A9 : jeudi 28 mars 2019 11:38
> > > > > =C3=80 : dots@ietf.org
> > > > > Objet : [Dots] clarification questions from the hackathon
> > > > >
> > > > > Hi,
> > > > >
> > > > > I'd like to continue discussion of these topics in the ML.
> > > > >
> > > > > #1: Questions about signal-control-filtering
> > > > >   1. Should a mitigation request create a mitigation before =
doing a PUT
> > +
> > > > > acl-list [{acl-name, activation-type}] against the active =
mitigation,
> > or
> > > is a
> > > > > =E2=80=98PUT + acl-list [{acl-name, activation-type}]=E2=80=99 =
allowed to create a new
> > > > > mitigation?
> > > >
> > > > [Med] Both are currently allowed in the draft. I don't still a =
valid
> > reason
> > > to
> > > > restrict this.
> > >
> > > [Jon] As per draft
> > >    A DOTS client MUST NOT use the filtering control over DOTS =
signal
> > >    channel if no attack (mitigation) is active;
> > >
> >
> > [Med] What is meant actually is:
> >
> >    A DOTS client MUST NOT use the filtering control over DOTS signal
> >    channel in 'idle' time;
> >
> > Will update the text.
> >
> > > [Jon] then needs to be reworded as there is no active mitigation =
until the
> > > PUT is done...
> > > I believe that both cases should be supported.
> > > >
> > > > >   2. Should the response to a GET (or Observed GET) include =
the acl-
> > list
> > > > > [{acl-name, activation-type}] if the PUT included it?
> > > >
> > > > [Med] The current spec says "no". That's said, what would be the =
value
> in
> > > > returning it? Then, why not allowing to return the references to =
all ACLs
> > > that
> > > > are enabled during the mitigation time?
> > > >
> > > [Jon] When observing the mitigation request, if the =
activation-type is
> > > changed externally, the client will then know about the change. =
Assuming
> > the
> > > response got back to the client, this is effectively an ACK to the =
fact
> > that
> > > the ACL change got through.
> >
> > [Med] The observe case makes sense, indeed.
> >
> > >
> > > Interesting concept about knowing about all the relevant ACLs as =
returned
> > > over the signal channel.  More work for the server to do in =
determining
> > which
> > > ACLs are valid for, say, a specific IP address that is being =
mitigated.
> > Not
> > > entirely convinced of the benefit of this as this generally is =
available
> > over
> > > the data channel.
> > >
> >
> > [Med] I'm not convinced, either.
> >
> _______________________________________________
> Dots mailing list
> Dots@ietf.org
> https://www.ietf.org/mailman/listinfo/dots


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From: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>
To: "mohamed.boucadair@orange.com" <mohamed.boucadair@orange.com>, Jon Shallow <supjps-ietf@jpshallow.com>, kaname nishizuka <kaname@nttv6.jp>, "dots@ietf.org" <dots@ietf.org>
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Subject: Re: [Dots] clarification questions from the hackathon
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From: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>
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From: <mohamed.boucadair@orange.com>
To: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>, "Jon Shallow" <supjps-ietf@jpshallow.com>, kaname nishizuka <kaname@nttv6.jp>, "dots@ietf.org" <dots@ietf.org>
Thread-Topic: [Dots] clarification questions from the hackathon
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Date: Mon, 1 Apr 2019 14:01:47 +0000
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Subject: Re: [Dots] clarification questions from the hackathon
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From: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>
To: "mohamed.boucadair@orange.com" <mohamed.boucadair@orange.com>, Jon Shallow <supjps-ietf@jpshallow.com>, kaname nishizuka <kaname@nttv6.jp>, "dots@ietf.org" <dots@ietf.org>
Thread-Topic: [Dots] clarification questions from the hackathon
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Subject: Re: [Dots] clarification questions from the hackathon
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Subject: Re: [Dots] Target-Attack-type expansion: more discussion
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Peace,

On Fri, Mar 29, 2019 at 12:15 PM =E9=99=88=E7=BE=8E=E7=8E=B2 <chenmeiling@c=
hinamobile.com> wrote:
> I'd like to continue discussion of these topics in the mail

For clarification, the quotations below that line are from the draft
[1], not from the mailing list thread.


> Therefore, it is necessary to unify the attack definition,
> form a standard attack definition

I do not anticipate that happening in the foreseeable future. Mainly,
because of the differences between traffic classifying and filtering
engines. Also, because the state of scientific research on the problem
space is quite poor.

> we give out a complete format for DDoS attacks as below

>From the text and also from the slides [2] it is not clear what
exactly you list under "protocol level".
It appears like something very close to the OSI layering, however,

a) in this case the proper word would be "layer", not "level",
b) the attribution seems quite arbitrary.

E.g. ICMP flood is coupled with "Network_Layer" while it could also
affect the data link layer if e.g. there's no "no arp packet-priority
enable" on an interface in a Cisco switched network.
The same with memcached reflection which could cause an effect on the
layer 2 through 4 performance of a network (and I'd even go as far as
to say that L4 being affected is the least likely case).

***

All in all, as I tried to point out during the session, I've
personally seen a similar problem of conversion between different item
classification methods being solved before in 3GPP world, where e.g.
HP OpenView and Huawei M2000/J2000 had almost entirely different
concepts of event type, status, and severity, yet communicated just
fine through software-defined mapping tables provided by the
respective vendors. Sometimes, it's best to follow that path, and a
good thing is: you don't need a years-long IETF process for that to go
live.

References:
[1]: https://tools.ietf.org/html/draft-meiling-dots-attack-type-expansion-0=
0
[2]: https://datatracker.ietf.org/meeting/104/materials/slides-104-dots-att=
ack-bandwidth-and-attack-type-expansion-01

--
T=C3=B6ma


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From: <mohamed.boucadair@orange.com>
To: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>, "Jon Shallow" <supjps-ietf@jpshallow.com>, kaname nishizuka <kaname@nttv6.jp>, "dots@ietf.org" <dots@ietf.org>
Thread-Topic: [Dots] clarification questions from the hackathon
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From nobody Tue Apr  2 07:21:38 2019
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From: "Jon Shallow" <supjps-ietf@jpshallow.com>
To: <mohamed.boucadair@orange.com>, <dots@ietf.org>
References: <155421064292.6387.16657228529546449549.idtracker@ietfa.amsl.com> <787AE7BB302AE849A7480A190F8B93302EA512C0@OPEXCAUBMA2.corporate.adroot.infra.ftgroup>
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Subject: Re: [Dots] TR: New Version Notification for draft-nishizuka-dots-signal-control-filtering-06.txt
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Hi Med,

Thanks for this.

Clarification / comment

3.2.1  Parameters & Behaviors
...
acl-name:  A name of an access list defined using the DOTS data
  channel (Section 7.2 of [I-D.ietf-dots-data-channel]).


The acl-name is unique per cuid, but the name can be duplicated, so =
perhaps

Updated

acl-name:  A name of an access list defined using the DOTS data
  channel (Section 7.2 of [I-D.ietf-dots-data-channel]) that is =
associated with the DOTS client's 'cuid'.

Old
Figure 5: GET to Retrieve the Filtering (After Mitigation)
New
Figure 5: DOTS Data Channel GET response after Mitigation

Old
Figure 6: DOTS Data Channel Request to Create an Accep-List Filter
New
Figure 6: DOTS Data Channel Request to Create an Accept-List Filter


Regards

Jon

> -----Original Message-----
> From: Dots [mailto: dots-bounces@ietf.org] On Behalf Of
> mohamed.boucadair@orange.com
> Sent: 02 April 2019 14:13
> To: dots@ietf.org
> Subject: [Dots] TR: New Version Notification for =
draft-nishizuka-dots-signal-
> control-filtering-06.txt
>=20
> Hi all,
>=20
> This version takes into account the comments received in Prague.
>=20
> The text was also restructured for a better readability.
>=20
> Questions, comments, and suggestions are more than welcome.
>=20
> Cheers,
> Med
>=20
> > -----Message d'origine-----
> > De : internet-drafts@ietf.org [mailto:internet-drafts@ietf.org]
> > Envoy=C3=A9 : mardi 2 avril 2019 15:11
> > =C3=80 : Takahiko Nagata; Tirumaleswar Reddy; BOUCADAIR Mohamed =
TGI/OLN;
> Reddy K;
> > Kaname Nishizuka
> > Objet : New Version Notification for =
draft-nishizuka-dots-signal-control-
> > filtering-06.txt
> >
> >
> > A new version of I-D, =
draft-nishizuka-dots-signal-control-filtering-06.txt
> > has been successfully submitted by Mohamed Boucadair and posted to =
the
> > IETF repository.
> >
> > Name:		draft-nishizuka-dots-signal-control-filtering
> > Revision:	06
> > Title:		Controlling Filtering Rules Using Distributed Denial-of-
> > Service Open Threat Signaling (DOTS) Signal Channel
> > Document date:	2019-04-02
> > Group:		Individual Submission
> > Pages:		23
> > URL:            =
https://www.ietf.org/internet-drafts/draft-nishizuka-dots-
> > signal-control-filtering-06.txt
> > Status:         =
https://datatracker.ietf.org/doc/draft-nishizuka-dots-signal-
> > control-filtering/
> > Htmlized:       =
https://tools.ietf.org/html/draft-nishizuka-dots-signal-
> > control-filtering-06
> > Htmlized:       =
https://datatracker.ietf.org/doc/html/draft-nishizuka-dots-
> > signal-control-filtering
> > Diff:           =
https://www.ietf.org/rfcdiff?url2=3Ddraft-nishizuka-dots-
> > signal-control-filtering-06
> >
> > Abstract:
> >    This document specifies an extension to the DOTS signal channel =
so
> >    that DOTS clients can control their filtering rules when an =
attack
> >    mitigation is active.
> >
> >    Particularly, this extension allows a DOTS client to activate or =
de-
> >    activate existing filtering rules during a DDoS attack.  The
> >    characterization of these filtering rules is supposed to be =
conveyed
> >    by a DOTS client during an idle time by means of the DOTS data
> >    channel protocol.
> >
> > Editorial Note (To be removed by RFC Editor)
> >
> >    Please update these statements within the document with the RFC
> >    number to be assigned to this document:
> >
> >    o  "This version of this YANG module is part of RFC XXXX;"
> >
> >    o  "RFC XXXX: Controlling Filtering Rules Using Distributed =
Denial-
> >       of-Service Open Threat Signaling (DOTS) Signal Channel";
> >
> >    o  reference: RFC XXXX
> >
> >    o  [RFCXXXX]
> >
> >    Please update these statements with the RFC number to be assigned =
to
> >    the following documents:
> >
> >    o  "RFC SSSS: Distributed Denial-of-Service Open Threat Signaling
> >       (DOTS) Signal Channel Specification" (used to be
> >       [I-D.ietf-dots-signal-channel])
> >
> >    o  "RFC DDDD: Distributed Denial-of-Service Open Threat Signaling
> >       (DOTS) Data Channel Specification" (used to be
> >       [I-D.ietf-dots-data-channel])
> >
> >    Please update the "revision" date of the YANG module.
> >
> >
> >
> >
> > Please note that it may take a couple of minutes from the time of
> submission
> > until the htmlized version and diff are available at tools.ietf.org.
> >
> > The IETF Secretariat
>=20
> _______________________________________________
> Dots mailing list
> Dots@ietf.org
> https://www.ietf.org/mailman/listinfo/dots


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To: Jon Shallow <supjps-ietf@jpshallow.com>, "dots@ietf.org" <dots@ietf.org>
Thread-Topic: [Dots] TR: New Version Notification for draft-nishizuka-dots-signal-control-filtering-06.txt
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From nobody Tue Apr  2 15:00:02 2019
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----------------------------------------------------------------------
COMMENT:
----------------------------------------------------------------------

I am balloting YES but noticed a few things in the -31 that can get addressed with
the rest of the IESG comments.

Section 4.4.1

      Implementations SHOULD set 'cuid' to the output of a cryptographic
      [...]
      [RFC6234].  The output of the cryptographic hash algorithm is
      truncated to 16 bytes; truncation is done by stripping off the
      final 16 bytes.  The truncated output is base64url encoded.

      [...]

      If a DOTS client has to change its 'cuid' for some reason, it MUST
      NOT do so when mitigations are still active for the old 'cuid'.
      The 'cuid' SHOULD be 22 characters to avoid DOTS signal message
      fragmentation over UDP.  [...]

We need to cite RFC 4648, Section 5, for base64url.  Also,
getting a 22-character base64url-encoded cuid requires stripping the
trailing '=' from the encoding, and we should explicitly say to do that.

   A similar attack can be achieved by a compromised DOTS client which
   can sniff the TLS 1.2 handshake, use the client certificate to
   identify the 'cuid' used by another DOTS client.  This attack is not
   possible if algorithms such as [RFC4122] are used to generate the
   'cuid'.  [...]

I think the key part of RFC4122 cuid generation (w.r.t. preventing
sniffing) is that it's non-deterministic (and thus non-guessable), so we
should say something like "because such UUIDs are not a deterministic
function of the client certificate".


Figure 11 needs to show the response that indicates a conflicting cuid that
triggers the second request.

Section 10

   When FQDNs are used as targets, the DOTS server MUST rely upon DNS
   privacy enabling protocols (e.g., DNS over TLS [RFC7858], DoH
   [RFC8484]) to prevent eavesdroppers from possibly identifying the
   target resources protected by the DDoS mitigation service and means
   to ensure the target FQDN resolution is authentic (e.g., DNSSEC
   [RFC4034]).

nits: "DNS over TLS or DoH" ("or" instead of comma, but keep the
references as-is); comma before "and means to ensure", since the DOTS
server has to do both of those (as opposed to the DOTS server using DoT/DoH
which provides both eavesdropping protection and data authenticity, which
is what the current text says).



From nobody Tue Apr  2 15:00:41 2019
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----------------------------------------------------------------------
COMMENT:
----------------------------------------------------------------------

As in the signal-channel document, there are a couple of nits in the text about
using FQDNs as mitigation targets:

Section 10

   When FQDNs are used as targets, the DOTS server MUST rely upon DNS
   privacy enabling protocols (e.g., DNS over TLS [RFC7858], DoH
   [RFC8484]) to prevent eavesdroppers from possibly identifying the
   target resources protected by the DDoS mitigation service and means
   to ensure the target FQDN resolution is authentic (e.g., DNSSEC
   [RFC4034]).

nits: "DNS over TLS or DoH" ("or" instead of comma, but keep the
references as-is); comma before "and means to ensure", since the DOTS
server has to do both of those (as opposed to the DOTS server using DoT/DoH
which provides both eavesdropping protection and data authenticity, which
is what the current text says).



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HI Med,

Thanks for the reply. I put my comments in lines.

On Sun, Mar 31, 2019 at 11:55 PM <mohamed.boucadair@orange.com> wrote:

> Hi Yoshi,
>
> Thank you for the review.
>
> Please see inline.
>
> Cheers,
> Med
>
> > -----Message d'origine-----
> > De : Yoshifumi Nishida via Datatracker [mailto:noreply@ietf.org]
> > Envoy=C3=A9 : dimanche 31 mars 2019 10:53
> > =C3=80 : tsv-art@ietf.org
> > Cc : draft-ietf-dots-signal-channel.all@ietf.org; ietf@ietf.org;
> > dots@ietf.org
> > Objet : Tsvart last call review of draft-ietf-dots-signal-channel-31
> >
> > Reviewer: Yoshifumi Nishida
> > Review result: Almost Ready
> >
> > This document has been reviewed as part of the transport area review
> team's
> > ongoing effort to review key IETF documents. These comments were writte=
n
> > primarily for the transport area directors, but are copied to the
> document's
> > authors and WG to allow them to address any issues raised and also to t=
he
> > IETF
> > discussion list for information.
> >
> > When done at the time of IETF Last Call, the authors should consider th=
is
> > review as part of the last-call comments they receive. Please always CC
> > tsv-art@ietf.org if you reply to or forward this review.
> >
> > Summary: This document is almost ready for publication, but it will be
> better
> > to clarify the following points.
> >
> > 1:   "it is out of scope of this document to specify the behavior to be
> > followed by a DOTS client to send DOTS requests when multiple
> >         DOTS servers are provisioned."
> >
> >       I'm not sure why it is out of scope. Does it bring a certain
> > complexities
> >       to the protocol?
> >      Or, does it simply mean it is up to implementations?
>
> [Med] This is because of specific considerations such as those discussed
> in draft-ietf-dots-multihoming. We don't want to overload the base spec
> with such considerations (discussed in separate documents). The same
> approach is followed for server discovery
> (draft-ietf-dots-server-discovery).
>

Got it. I think it would be useful for readers to mention it in the draft.


> > 2:   "The DOTS client periodically repeats the mechanism to discover
> whether
> > DOTS signal
> >         channel messages with DTLS over UDP becomes available from the
> DOTS
> >         server.."
> >
> >        -> Does this mean DOTS clients will not repeat this when it
> already
> > has
> >        DTLS over UDP connection?
> >            What about if the client has DTLS over UDPv4? Does it try to
> check
> >            DTLS over UDPv6? Also, is this logic MAY or SHOULD or don't
> want
> > to
> >            specify?
>
> [Med] The client will retry when the cache flushes out:


>    Note that the DOTS client after successfully establishing a
>    connection MUST cache information regarding the outcome of each
>    connection attempt for a specific time period, and it uses that
>    information to avoid thrashing the network with subsequent attempts.
>

OK, but if you retry anyway after a certain time, why do you need to cache
the results?

> 3:   "DOTS agents SHOULD follow the data transmission guidelines discusse=
d
> >         in Section 3.1.3 of [RFC8085] and control transmission behavior
> by
> >         not sending more than one UDP datagram per round-trip time (RTT=
)
> to
> >         the peer DOTS agent on average."
> >
> >       ->  How about TCP connections?
>
> [Med] TCP does not have the issue with non-confirmable messages. FWIW,
> RFC8323 states the following:
>
>    The request/response interaction model of CoAP over TCP is the same
>    as CoAP over UDP.  The primary differences are in the message layer.
>    The message layer of CoAP over UDP supports optional reliability by
>    defining four types of messages: Confirmable, Non-confirmable,
>    Acknowledgment, and Reset.
>
>    ...
>
>    Since TCP eliminates the need for the message layer to support
>    reliability, CoAP over reliable transports does not support
>    Confirmable or Non-confirmable message types.
>

I see. Thanks for the clarification.
--
Yoshi

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<div dir=3D"ltr"><div dir=3D"ltr"><div>HI Med,</div><div><br></div><div>Tha=
nks for the reply. I put my comments in lines.</div><br><div class=3D"gmail=
_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Sun, Mar 31, 2019 at 11:55=
 PM &lt;<a href=3D"mailto:mohamed.boucadair@orange.com" target=3D"_blank">m=
ohamed.boucadair@orange.com</a>&gt; wrote:<br></div><blockquote class=3D"gm=
ail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,=
204,204);padding-left:1ex">Hi Yoshi, <br>
<br>
Thank you for the review. <br>
<br>
Please see inline.<br>
<br>
Cheers,<br>
Med<br>
<br>
&gt; -----Message d&#39;origine-----<br>
&gt; De=C2=A0: Yoshifumi Nishida via Datatracker [mailto:<a href=3D"mailto:=
noreply@ietf.org" target=3D"_blank">noreply@ietf.org</a>]<br>
&gt; Envoy=C3=A9=C2=A0: dimanche 31 mars 2019 10:53<br>
&gt; =C3=80=C2=A0: <a href=3D"mailto:tsv-art@ietf.org" target=3D"_blank">ts=
v-art@ietf.org</a><br>
&gt; Cc=C2=A0: <a href=3D"mailto:draft-ietf-dots-signal-channel.all@ietf.or=
g" target=3D"_blank">draft-ietf-dots-signal-channel.all@ietf.org</a>; <a hr=
ef=3D"mailto:ietf@ietf.org" target=3D"_blank">ietf@ietf.org</a>;<br>
&gt; <a href=3D"mailto:dots@ietf.org" target=3D"_blank">dots@ietf.org</a><b=
r>
&gt; Objet=C2=A0: Tsvart last call review of draft-ietf-dots-signal-channel=
-31<br>
&gt; <br>
&gt; Reviewer: Yoshifumi Nishida<br>
&gt; Review result: Almost Ready<br>
&gt; <br>
&gt; This document has been reviewed as part of the transport area review t=
eam&#39;s<br>
&gt; ongoing effort to review key IETF documents. These comments were writt=
en<br>
&gt; primarily for the transport area directors, but are copied to the docu=
ment&#39;s<br>
&gt; authors and WG to allow them to address any issues raised and also to =
the<br>
&gt; IETF<br>
&gt; discussion list for information.<br>
&gt; <br>
&gt; When done at the time of IETF Last Call, the authors should consider t=
his<br>
&gt; review as part of the last-call comments they receive. Please always C=
C<br>
&gt; <a href=3D"mailto:tsv-art@ietf.org" target=3D"_blank">tsv-art@ietf.org=
</a> if you reply to or forward this review.<br>
&gt; <br>
&gt; Summary: This document is almost ready for publication, but it will be=
 better<br>
&gt; to clarify the following points.<br>
&gt; <br>
&gt; 1:=C2=A0 =C2=A0&quot;it is out of scope of this document to specify th=
e behavior to be<br>
&gt; followed by a DOTS client to send DOTS requests when multiple<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0DOTS servers are provisioned.&quot;<b=
r>
&gt; <br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0I&#39;m not sure why it is out of scope. Doe=
s it bring a certain<br>
&gt; complexities<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0to the protocol?<br>
&gt;=C2=A0 =C2=A0 =C2=A0 Or, does it simply mean it is up to implementation=
s?<br>
<br>
[Med] This is because of specific considerations such as those discussed in=
 draft-ietf-dots-multihoming. We don&#39;t want to overload the base spec w=
ith such considerations (discussed in separate documents). The same approac=
h is followed for server discovery (draft-ietf-dots-server-discovery). <br>=
</blockquote><div><br></div><div>Got it. I think it would be useful for rea=
ders to mention it in the draft.=C2=A0</div><div>=C2=A0 =C2=A0</div><blockq=
uote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1p=
x solid rgb(204,204,204);padding-left:1ex">
&gt; 2:=C2=A0 =C2=A0&quot;The DOTS client periodically repeats the mechanis=
m to discover whether<br>
&gt; DOTS signal<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0channel messages with DTLS over UDP b=
ecomes available from the DOTS<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0server..&quot;<br>
&gt; <br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 -&gt; Does this mean DOTS clients will not =
repeat this when it already<br>
&gt; has<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 DTLS over UDP connection?<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 What about if the client has =
DTLS over UDPv4? Does it try to check<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 DTLS over UDPv6? Also, is thi=
s logic MAY or SHOULD or don&#39;t want<br>
&gt; to<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 specify?<br>
<br>
[Med] The client will retry when the cache flushes out:</blockquote><blockq=
uote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1p=
x solid rgb(204,204,204);padding-left:1ex"><br>
=C2=A0 =C2=A0Note that the DOTS client after successfully establishing a<br=
>
=C2=A0 =C2=A0connection MUST cache information regarding the outcome of eac=
h<br>
=C2=A0 =C2=A0connection attempt for a specific time period, and it uses tha=
t<br>
=C2=A0 =C2=A0information to avoid thrashing the network with subsequent att=
empts.<br></blockquote><div>=C2=A0</div><div>OK, but if you retry anyway af=
ter a certain time, why do you need to cache the results?</div><div><br></d=
iv><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;bord=
er-left:1px solid rgb(204,204,204);padding-left:1ex">
&gt; 3:=C2=A0 =C2=A0&quot;DOTS agents SHOULD follow the data transmission g=
uidelines discussed<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0in Section 3.1.3 of [RFC8085] and con=
trol transmission behavior by<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0not sending more than one UDP datagra=
m per round-trip time (RTT) to<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0the peer DOTS agent on average.&quot;=
<br>
&gt; <br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0-&gt;=C2=A0 How about TCP connections? <br>
<br>
[Med] TCP does not have the issue with non-confirmable messages. FWIW, RFC8=
323 states the following: <br>
<br>
=C2=A0 =C2=A0The request/response interaction model of CoAP over TCP is the=
 same<br>
=C2=A0 =C2=A0as CoAP over UDP.=C2=A0 The primary differences are in the mes=
sage layer.<br>
=C2=A0 =C2=A0The message layer of CoAP over UDP supports optional reliabili=
ty by<br>
=C2=A0 =C2=A0defining four types of messages: Confirmable, Non-confirmable,=
<br>
=C2=A0 =C2=A0Acknowledgment, and Reset.<br>
<br>
=C2=A0 =C2=A0...<br>
<br>
=C2=A0 =C2=A0Since TCP eliminates the need for the message layer to support=
<br>
=C2=A0 =C2=A0reliability, CoAP over reliable transports does not support<br=
>
=C2=A0 =C2=A0Confirmable or Non-confirmable message types.<br></blockquote>=
<div><br></div><div>I see. Thanks for the clarification.=C2=A0</div><div>--=
</div><div>Yoshi</div><div><br></div><div><br></div><div><br></div><div>=C2=
=A0</div></div></div></div>

--00000000000076151a05859348aa--


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From: <mohamed.boucadair@orange.com>
To: Benjamin Kaduk <kaduk@mit.edu>
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Thread-Topic: Benjamin Kaduk's Yes on draft-ietf-dots-signal-channel-31: (with COMMENT)
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Subject: Re: [Dots] Benjamin Kaduk's Yes on draft-ietf-dots-signal-channel-31: (with COMMENT)
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From nobody Tue Apr  2 23:17:38 2019
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Date: Wed, 3 Apr 2019 15:17:24 +0900
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Subject: [Dots] Next action: draft-hayashi-dots-dms-offload-usecase
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Hi all,

Thank you for giving me feedback at IETF104. Based on the feedback of WG
and co-authors, I would like to modify my draft in the following policy.

1) Insert JSON Example of DOTS signaling into "Case: Mitigation Request via
In-band Link".
2) Clarify deployment considerations into both "Case: DOTS Request via
Out-of-band Link " and "Case: Mitigation Request via In-band Link".

I suppose that "Case: DOTS Request via Out-of-band Link " doesn't require
no expansion of current Data Channel. However, I suppose that "Case:
Mitigation Request via In-band Link" requires some expansion of current
Signal Channel such as the source-* clauses defined in
reddy-dots-home-network.

I will share my draft after modification.

Thanks,
Yuhei

-- 
----------------------------------
Yuuhei HAYASHI
08065300884
yuuhei.hayashi@gmail.com
iehuuy_0220@docomo.ne.jp
----------------------------------

--00000000000081c38a05859a352e
Content-Type: text/html; charset="UTF-8"
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<div dir=3D"ltr"><div>Hi all,<br>
<br>Thank you for giving me feedback at IETF104. Based on the feedback of W=
G and co-authors, I would like to modify my draft in the following policy.<=
br>
<br>1) Insert JSON Example of DOTS signaling into &quot;Case: Mitigation Re=
quest via In-band Link&quot;.<br>2) Clarify deployment considerations into =
both &quot;Case: DOTS Request via Out-of-band Link &quot; and &quot;Case: M=
itigation Request via In-band Link&quot;.<br>
<br><div dir=3D"auto">I suppose that &quot;Case: DOTS Request via Out-of-ba=
nd Link &quot; doesn&#39;t require no expansion of current Data Channel. Ho=
wever, I suppose that &quot;Case: Mitigation Request via In-band Link&quot;=
 requires some expansion of current Signal Channel such as the source-* cla=
uses defined in reddy-dots-home-network.</div><br>I will share my draft aft=
er modification.=C2=A0<br><br>Thanks,<br>Yuhei</div><div><br>-- <br>-------=
---------------------------<br>Yuuhei HAYASHI<br>08065300884<br>
<a href=3D"mailto:yuuhei.hayashi@gmail.com" target=3D"_blank">yuuhei.hayash=
i@gmail.com</a><br>
<a href=3D"mailto:iehuuy_0220@docomo.ne.jp" target=3D"_blank">iehuuy_0220@d=
ocomo.ne.jp</a><br>----------------------------------<br>
</div>
</div>

--00000000000081c38a05859a352e--


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To: Yoshifumi Nishida <nishida@sfc.wide.ad.jp>
CC: Yoshifumi Nishida <nishida@wide.ad.jp>, "tsv-art@ietf.org" <tsv-art@ietf.org>, "draft-ietf-dots-signal-channel.all@ietf.org" <draft-ietf-dots-signal-channel.all@ietf.org>, "ietf@ietf.org" <ietf@ietf.org>, "dots@ietf.org" <dots@ietf.org>
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From nobody Wed Apr  3 01:53:01 2019
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Subject: [Dots] I-D Action: draft-ietf-dots-architecture-13.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the DDoS Open Threat Signaling WG of the IETF.

        Title           : Distributed-Denial-of-Service Open Threat Signaling (DOTS) Architecture
        Authors         : Andrew Mortensen
                          Tirumaleswar Reddy
                          Flemming Andreasen
                          Nik Teague
                          Rich Compton
	Filename        : draft-ietf-dots-architecture-13.txt
	Pages           : 34
	Date            : 2019-04-03

Abstract:
   This document describes an architecture for establishing and
   maintaining Distributed Denial of Service (DDoS) Open Threat
   Signaling (DOTS) within and between domains.  The document does not
   specify protocols or protocol extensions, instead focusing on
   defining architectural relationships, components and concepts used in
   a DOTS deployment.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-dots-architecture/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-dots-architecture-13
https://datatracker.ietf.org/doc/html/draft-ietf-dots-architecture-13

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-dots-architecture-13


Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/


From nobody Thu Apr  4 02:26:28 2019
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=0A<div><span></span>I have read the draft-doron-dots-telemetry-00, it is =
not neccessary to add all the parameters contained in the draft of&nbsp;<s=
pan style=3D"font-size: 10.5pt; line-height: 1.5; background-color: transp=
arent;">draft-doron-dots-telemetry-00;</span></div><div>When discuss a par=
ameter is needed for signal channel expansion or not, there are two proble=
ms we need to take into consideration: 1, if the attack target can provide=
 the message? 2, if the parameter can really efficent for mitigation?</div=
><div>so far, network device can provide attack-bandwidth and attack-type =
and &nbsp;this two drafts will be merged into a single draft.&nbsp;</div>=
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s=3D"MsoNormal" style=3D"text-align: justify; margin: 0cm 0cm 0.0001pt; fo=
nt-size: 12pt; font-family: =E5=AE=8B=E4=BD=93;"><span style=3D"font-size:=
10.5pt;color:#1F497D">=E7=A5=9D=E5=A5=BD=EF=BC=81</span><span lang=3D"EN-U=
S" style=3D"font-size: 10.5pt; font-family: Calibri, sans-serif;"><o:p></o=
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span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:&quot;Calibri&qu=
ot;,&quot;sans-serif&quot;;=0Acolor:#1F497D">chenmeiling</span><span style=
=3D"font-size:10.5pt;color:#1F497D">=EF=BC=88=E9=99=88=E7=BE=8E=E7=8E=B2=
=EF=BC=89</span><span lang=3D"EN-US" style=3D"font-size: 10.5pt; font-fami=
ly: Calibri, sans-serif;"><o:p></o:p></span></p>=0A<p class=3D"MsoNormal" =
style=3D"text-align: justify; margin: 0cm 0cm 0.0001pt; font-size: 12pt; f=
ont-family: =E5=AE=8B=E4=BD=93;"><span lang=3D"EN-US" style=3D"font-size:1=
0.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;=0Acolor:#1F4=
97D">---------------------------------------------------------------------=
-----------------<br>=0A</span><span style=3D"font-size:10.5pt;color:#1F49=
7D">=E4=B8=AD=E5=9B=BD=E7=A7=BB=E5=8A=A8=E9=80=9A=E4=BF=A1=E6=9C=89=E9=99=
=90=E5=85=AC=E5=8F=B8=E7=A0=94=E7=A9=B6=E9=99=A2</span><span lang=3D"EN-US=
" style=3D"font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-ser=
if&quot;;=0Acolor:#1F497D"><br>=0A</span><span style=3D"font-size:10.5pt;c=
olor:#1F497D">=E5=AE=89=E5=85=A8=E6=8A=80=E6=9C=AF=E7=A0=94=E7=A9=B6=E6=89=
=80</span><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:&quot=
;Calibri&quot;,&quot;sans-serif&quot;;=0Acolor:#1F497D"><br>=0A</span><spa=
n style=3D"font-size:10.5pt;color:#1F497D">=E9=82=AE=E7=AE=B1=EF=BC=9A</sp=
an><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:&quot;Calibr=
i&quot;,&quot;sans-serif&quot;;color:#1F497D"><a href=3D"mailto:zhangyanyj=
@chinamobile.com" style=3D"color: blue;">chenmeiling@chinamobile.com</a><b=
r>=0A</span><span style=3D"font-size:10.5pt;color:#1F497D">=E6=89=8B=E6=9C=
=BA=EF=BC=9A</span><span lang=3D"EN-US" style=3D"font-size:10.5pt;font-fam=
ily:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">13810149515<=
/span><span lang=3D"EN-US" style=3D"font-size: 10.5pt; font-family: Calibr=
i, sans-serif;"><o:p></o:p></span></p>=0A<p class=3D"MsoNormal" style=3D"t=
ext-align: justify; margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family=
: =E5=AE=8B=E4=BD=93;"><span style=3D"font-size:10.5pt;color:#1F497D">=E7=
=94=B5=E8=AF=9D=EF=BC=9A</span><span lang=3D"EN-US" style=3D"font-size:10.=
5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">=
15801696688-34283<br>=0A</span><span style=3D"font-size:10.5pt;color:#1F49=
7D">=E5=9C=B0=E5=9D=80=EF=BC=9A=E5=8C=97=E4=BA=AC=E5=B8=82=E8=A5=BF=E5=9F=
=8E=E5=8C=BA=E5=AE=A3=E6=AD=A6=E9=97=A8=E8=A5=BF=E5=A4=A7=E8=A1=97</span><=
span lang=3D"EN-US" style=3D"font-size:10.5pt;font-family:&quot;Calibri&qu=
ot;,&quot;sans-serif&quot;;=0Acolor:#1F497D">32</span><span style=3D"font-=
size:10.5pt;color:#1F497D">=E5=8F=B7=EF=BC=88=E7=A7=BB=E5=8A=A8=E5=88=9B=
=E6=96=B0=E5=A4=A7=E5=8E=A6=EF=BC=89</span><span lang=3D"EN-US" style=3D"f=
ont-size: 10.5pt; font-family: Calibri, sans-serif;"><o:p></o:p></span></p=
>=0A<!--EndFragment--></div></span></div>=0A<blockquote style=3D"margin-To=
p: 0px; margin-Bottom: 0px; margin-Left: 0.5em"><div>&nbsp;</div><div styl=
e=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm"=
><div style=3D"PADDING-RIGHT: 8px; PADDING-LEFT: 8px; FONT-SIZE: 12px;FONT=
-FAMILY:tahoma;COLOR:#000000; BACKGROUND: #efefef; PADDING-BOTTOM: 8px; PA=
DDING-TOP: 8px"><div><b>From:</b>&nbsp;<a href=3D"mailto:TirumaleswarReddy=
_Konda@McAfee.com" style=3D"color: rgb(5, 99, 193); text-decoration: under=
line;">Konda, Tirumaleswar Reddy</a></div><div><b>Date:</b>&nbsp;2019-04-0=
1&nbsp;21:37</div><div><b>To:</b>&nbsp;<a href=3D"mailto:chenmeiling@china=
mobile.com" style=3D"color: rgb(5, 99, 193); text-decoration: underline;">=
=E9=99=88=E7=BE=8E=E7=8E=B2</a>; <a href=3D"mailto:dots@ietf.org" style=3D=
"color: rgb(5, 99, 193); text-decoration: underline;">dots</a></div><div><=
b>Subject:</b>&nbsp;RE: [Dots] Attack-bandwidth expansion: more discussion=
</div></div></div><div><div class=3D"FoxDiv20190404164808025677">=0A<!--[i=
f gte mso 9]><xml>=0A<o:shapedefaults v:ext=3D"edit" spidmax=3D"1026" ></o=
:shapedefaults>=0A</xml><![endif]--><!--[if gte mso 9]><xml>=0A<o:shapelay=
out v:ext=3D"edit">=0A<o:idmap v:ext=3D"edit" data=3D"1" ></o:idmap>=0A</o=
:shapelayout></xml><![endif]-->=0A<div class=3D"WordSection1" style=3D"pag=
e: WordSection1;">=0A<p class=3D"MsoNormal" style=3D"margin: 0in 0in 0.000=
1pt; font-size: 11pt; font-family: Calibri, sans-serif;">We published a dr=
aft <a href=3D"https://tools.ietf.org/html/draft-doron-dots-telemetry-00" =
style=3D"color: rgb(5, 99, 193); text-decoration: underline;">=0Ahttps://t=
ools.ietf.org/html/draft-doron-dots-telemetry-00</a> discussing various DO=
TS telemetry including total attack traffic, but at that the decision was =
to focus only on the mandatory attributes in the DOTS signal channel draft=
.&nbsp; Now that the core protocols=0A are almost ready, I think it=E2=80=
=99s right time to look into the telemetry attributes. We should probably =
discuss and consolidate the DOTS telemetry attributes in a single draft.=
=0A<o:p></o:p></p>=0A<p class=3D"MsoNormal" style=3D"margin: 0in 0in 0.000=
1pt; font-size: 11pt; font-family: Calibri, sans-serif;"><o:p>&nbsp;</o:p>=
</p>=0A<p class=3D"MsoNormal" style=3D"margin: 0in 0in 0.0001pt; font-size=
: 11pt; font-family: Calibri, sans-serif;">Cheers,<o:p></o:p></p>=0A<p cla=
ss=3D"MsoNormal" style=3D"margin: 0in 0in 0.0001pt; font-size: 11pt; font-=
family: Calibri, sans-serif;">-Tiru<o:p></o:p></p>=0A<p class=3D"MsoNormal=
" style=3D"margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri=
, sans-serif;"><o:p>&nbsp;</o:p></p>=0A<div style=3D"border:none;border-le=
ft:solid blue 1.5pt;padding:0in 0in 0in 4.0pt">=0A<div>=0A<div style=3D"bo=
rder:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in">=0A<p =
class=3D"MsoNormal" style=3D"margin: 0in 0in 0.0001pt; font-size: 11pt; fo=
nt-family: Calibri, sans-serif;"><b>From:</b> Dots &lt;dots-bounces@ietf.o=
rg&gt; <b>On Behalf Of </b>=0A???<br>=0A<b>Sent:</b> Friday, March 29, 201=
9 4:37 PM<br>=0A<b>To:</b> dots &lt;dots@ietf.org&gt;<br>=0A<b>Subject:</b=
> [Dots] Attack-bandwidth expansion: more discussion<o:p></o:p></p>=0A</di=
v>=0A</div>=0A<p class=3D"MsoNormal" style=3D"margin: 0in 0in 0.0001pt; fo=
nt-size: 11pt; font-family: Calibri, sans-serif;"><o:p>&nbsp;</o:p></p>=0A=
<div>=0A<table class=3D"MsoNormalTable" border=3D"1" cellspacing=3D"3" cel=
lpadding=3D"0" style=3D"background:#F3FF33;border:solid #9B9A87 1.5pt">=0A=
<tbody>=0A<tr>=0A<td style=3D"border:none;padding:.75pt .75pt .75pt .75pt"=
>=0A<p><strong><span style=3D"font-family:&quot;Arial&quot;,sans-serif;col=
or:#9B8B3E">CAUTION</span></strong><span style=3D"font-family:&quot;Arial&=
quot;,sans-serif;color:#9B8B3E">:</span><span style=3D"font-family:&quot;A=
rial&quot;,sans-serif;color:black"> External email. Do not click links or =
open=0A attachments unless you recognize the sender and know the content i=
s safe.</span><span style=3D"font-family:&quot;Arial&quot;,sans-serif"><o:=
p></o:p></span></p>=0A</td>=0A</tr>=0A</tbody>=0A</table>=0A<div class=3D"=
MsoNormal" align=3D"center" style=3D"text-align: center; margin: 0in 0in 0=
.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;">=0A<hr size=
=3D"3" width=3D"100%" align=3D"center">=0A</div>=0A</div>=0A<p><span style=
=3D"font-family:&quot;Times New Roman&quot;,serif">Hi everyone,</span><o:p=
></o:p></p>=0A<p><span style=3D"font-family:&quot;Times New Roman&quot;,se=
rif">Due to time constraints during my presentation, we hadn't make much m=
ore discuss yesterday,&nbsp;</span><o:p></o:p></p>=0A<p><span style=3D"fon=
t-family:&quot;Times New Roman&quot;,serif">I'd&nbsp;like&nbsp;to&nbsp;con=
tinue&nbsp;discussion&nbsp;of&nbsp;these&nbsp;topics&nbsp;in&nbsp;the mail=
 if you have any questions about this draft.&nbsp;</span><o:p></o:p></p>=
=0A<p><o:p>&nbsp;</o:p></p>=0A<p style=3D"margin:0in;margin-bottom:.0001pt=
;text-align:justify;text-justify:inter-ideograph">=0A<span style=3D"font-s=
ize:10.5pt;color:#1F497D">MeiLing Chen</span><span style=3D"font-size:10.5=
pt;font-family:&quot;=E5=AE=8B=E4=BD=93,NSimSun,SimSun&quot;,serif"><o:p><=
/o:p></span></p>=0A<p style=3D"margin:0in;margin-bottom:.0001pt;text-align=
:justify;text-justify:inter-ideograph;line-height:19.5pt;background:#F7F8F=
A;min-height: 26px">=0A<span style=3D"font-size:10.5pt;font-family:&quot;A=
rial&quot;,sans-serif;color:#333333">-------------------------------------=
-------------------------------------------------<o:p></o:p></span></p>=0A=
<p style=3D"margin:0in;margin-bottom:.0001pt;text-align:justify;text-justi=
fy:inter-ideograph;line-height:19.5pt;background:#F7F8FA;min-height: 26px"=
>=0A<span style=3D"font-size:10.5pt;font-family:&quot;Arial&quot;,sans-ser=
if;color:#333333">Research institute of China mobile communications co. LT=
D<o:p></o:p></span></p>=0A<p style=3D"margin:0in;margin-bottom:.0001pt;tex=
t-align:justify;text-justify:inter-ideograph;line-height:19.5pt;background=
:#F7F8FA;min-height: 26px">=0A<span style=3D"font-size:10.5pt;font-family:=
&quot;Arial&quot;,sans-serif;color:#333333">Institute of safety technology=
<o:p></o:p></span></p>=0A<p style=3D"margin:0in;margin-bottom:.0001pt;text=
-align:justify;text-justify:inter-ideograph;line-height:19.5pt;background:=
#F7F8FA;min-height: 26px">=0A<span style=3D"font-size:10.5pt;font-family:&=
quot;Arial&quot;,sans-serif;color:#333333">Email address:=0A<a href=3D"mai=
lto:chenmeiling@chinamobile.com" style=3D"color: rgb(5, 99, 193); text-dec=
oration: underline;">chenmeiling@chinamobile.com</a><o:p></o:p></span></p>=
=0A<p style=3D"margin:0in;margin-bottom:.0001pt;text-align:justify;text-ju=
stify:inter-ideograph;line-height:19.5pt;background:#F7F8FA;min-height: 26=
px">=0A<span style=3D"font-size:10.5pt;font-family:&quot;Arial&quot;,sans-=
serif;color:#333333">Phone: 13810149515<o:p></o:p></span></p>=0A<p style=
=3D"margin:0in;margin-bottom:.0001pt;text-align:justify;text-justify:inter=
-ideograph;line-height:19.5pt;background:#F7F8FA;min-height: 26px">=0A<spa=
n style=3D"font-size:10.5pt;font-family:&quot;Arial&quot;,sans-serif;color=
:#333333">Address: no. 32, xuanwumen west street, xicheng district, Beijin=
g (mobile innovation building)<o:p></o:p></span></p>=0A<p class=3D"MsoNorm=
al" style=3D"margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calib=
ri, sans-serif;">&nbsp;<o:p></o:p></p>=0A</div>=0A</div>=0A</div></div></b=
lockquote>=0A</body></html>
------=_001_NextPart274755583251_=------





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Subject: Re: [Dots] Target-Attack-type expansion: more discussion
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cmcNCj4gaHR0cHM6Ly93d3cuaWV0Zi5vcmcvbWFpbG1hbi9saXN0aW5mby9kb3RzDQo=


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From: Yoshifumi Nishida <nishida@sfc.wide.ad.jp>
Date: Thu, 4 Apr 2019 09:38:02 -0700
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Cc: Yoshifumi Nishida <nishida@sfc.wide.ad.jp>, Yoshifumi Nishida <nishida@wide.ad.jp>,  "tsv-art@ietf.org" <tsv-art@ietf.org>,  "draft-ietf-dots-signal-channel.all@ietf.org" <draft-ietf-dots-signal-channel.all@ietf.org>,  "ietf@ietf.org" <ietf@ietf.org>, "dots@ietf.org" <dots@ietf.org>
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Subject: Re: [Dots] Tsvart last call review of draft-ietf-dots-signal-channel-31
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Hi Med,

On Tue, Apr 2, 2019 at 11:35 PM <mohamed.boucadair@orange.com> wrote:

> Hi Yoshi,
>
>
>
> Please see inline.
>
>
>
> Cheers,
>
> Med
>
>
>
> *De :* Yoshifumi Nishida [mailto:nishida@sfc.wide.ad.jp]
> *Envoy=C3=A9 :* mercredi 3 avril 2019 00:02
> *=C3=80 :* BOUCADAIR Mohamed TGI/OLN
> *Cc :* Yoshifumi Nishida; tsv-art@ietf.org;
> draft-ietf-dots-signal-channel.all@ietf.org; ietf@ietf.org; dots@ietf.org
> *Objet :* Re: Tsvart last call review of draft-ietf-dots-signal-channel-3=
1
>
>
>
> HI Med,
>
>
>
> Thanks for the reply. I put my comments in lines.
>
>
>
> On Sun, Mar 31, 2019 at 11:55 PM <mohamed.boucadair@orange.com> wrote:
>
> Hi Yoshi,
>
> Thank you for the review.
>
> Please see inline.
>
> Cheers,
> Med
>
> > -----Message d'origine-----
> > De : Yoshifumi Nishida via Datatracker [mailto:noreply@ietf.org]
> > Envoy=C3=A9 : dimanche 31 mars 2019 10:53
> > =C3=80 : tsv-art@ietf.org
> > Cc : draft-ietf-dots-signal-channel.all@ietf.org; ietf@ietf.org;
> > dots@ietf.org
> > Objet : Tsvart last call review of draft-ietf-dots-signal-channel-31
> >
> > Reviewer: Yoshifumi Nishida
> > Review result: Almost Ready
> >
> > This document has been reviewed as part of the transport area review
> team's
> > ongoing effort to review key IETF documents. These comments were writte=
n
> > primarily for the transport area directors, but are copied to the
> document's
> > authors and WG to allow them to address any issues raised and also to t=
he
> > IETF
> > discussion list for information.
> >
> > When done at the time of IETF Last Call, the authors should consider th=
is
> > review as part of the last-call comments they receive. Please always CC
> > tsv-art@ietf.org if you reply to or forward this review.
> >
> > Summary: This document is almost ready for publication, but it will be
> better
> > to clarify the following points.
> >
> > 1:   "it is out of scope of this document to specify the behavior to be
> > followed by a DOTS client to send DOTS requests when multiple
> >         DOTS servers are provisioned."
> >
> >       I'm not sure why it is out of scope. Does it bring a certain
> > complexities
> >       to the protocol?
> >      Or, does it simply mean it is up to implementations?
>
> [Med] This is because of specific considerations such as those discussed
> in draft-ietf-dots-multihoming. We don't want to overload the base spec
> with such considerations (discussed in separate documents). The same
> approach is followed for server discovery
> (draft-ietf-dots-server-discovery).
>
>
>
> Got it. I think it would be useful for readers to mention it in the draft=
.
>
>
>
> [Med] I updated the text as follows :
>
>
>
>    Likewise, it is out of scope of this document to specify the behavior
>
>    to be followed by a DOTS client to send DOTS requests when multiple
>
>    DOTS servers are provisioned (e.g., contact all DOTS servers, select
>
>    one DOTS server among the list).  Such behavior is specified in other
>
>                                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>
>    documents (e.g.,  [I-D.ietf-dots-multihoming]).
>
>   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>

WFM. Thanks for the updates!


>
>
>
>
> > 2:   "The DOTS client periodically repeats the mechanism to discover
> whether
> > DOTS signal
> >         channel messages with DTLS over UDP becomes available from the
> DOTS
> >         server.."
> >
> >        -> Does this mean DOTS clients will not repeat this when it
> already
> > has
> >        DTLS over UDP connection?
> >            What about if the client has DTLS over UDPv4? Does it try to
> check
> >            DTLS over UDPv6? Also, is this logic MAY or SHOULD or don't
> want
> > to
> >            specify?
>
> [Med] The client will retry when the cache flushes out:
>
>
>    Note that the DOTS client after successfully establishing a
>    connection MUST cache information regarding the outcome of each
>    connection attempt for a specific time period, and it uses that
>    information to avoid thrashing the network with subsequent attempts.
>
>
>
> OK, but if you retry anyway after a certain time, why do you need to cach=
e
> the results?
>
>
>
> [Med] =E2=80=9Cto avoid thrashing the network with subsequent attempts=E2=
=80=9D as the
> text says. Also, caching avoids the inconvenience of selection during
> attack times. Typically, the client executes the HE procedure when it
> initializes and uses the outcome of the procedure for subsequent DOTS
> signal exchanges during a certain period. Please refer to this text in th=
e
> draft:
>

Hmm. let's say the results of the happy eyeballs was TCP over IPv4 (just
like the figure 4) and the client cache the info.
After certain period of time, the client will do happy eyeball again
because other better connections might be available . But, in this case,
how the cached info will be used?

It seems that an implementation that doesn't cache the info at all and does
happy eyeballs at every 10 hours won't be allowed in this draft.

Thanks,
--
Yoshi

>

--0000000000002226380585b6ff04
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div>Hi Med,</div><br><div class=3D"gmail_quote"><div dir=
=3D"ltr" class=3D"gmail_attr">On Tue, Apr 2, 2019 at 11:35 PM &lt;<a href=
=3D"mailto:mohamed.boucadair@orange.com" target=3D"_blank">mohamed.boucadai=
r@orange.com</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" styl=
e=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);paddin=
g-left:1ex">





<div lang=3D"FR">
<div class=3D"m_-7884665924730068167gmail-m_6776049339142017523WordSection1=
">
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10pt;font-fa=
mily:&quot;Courier New&quot;;color:black">Hi Yoshi,
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10pt;font-fa=
mily:&quot;Courier New&quot;;color:black"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10pt;font-fa=
mily:&quot;Courier New&quot;;color:black">Please see inline.<u></u><u></u><=
/span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10pt;font-fa=
mily:&quot;Courier New&quot;;color:black"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10pt;font-fa=
mily:&quot;Courier New&quot;;color:black">Cheers,<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10pt;font-fa=
mily:&quot;Courier New&quot;;color:black">Med<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10pt;font-fa=
mily:&quot;Courier New&quot;;color:black"><u></u>=C2=A0<u></u></span></p>
<div style=3D"border-top:none;border-right:none;border-bottom:none;border-l=
eft:1.5pt solid blue;padding:0cm 0cm 0cm 4pt">
<div>
<div style=3D"border-right:none;border-bottom:none;border-left:none;border-=
top:1pt solid rgb(181,196,223);padding:3pt 0cm 0cm">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10pt;font-family:Tahoma,=
sans-serif">De=C2=A0:</span></b><span style=3D"font-size:10pt;font-family:T=
ahoma,sans-serif"> Yoshifumi Nishida [mailto:<a href=3D"mailto:nishida@sfc.=
wide.ad.jp" target=3D"_blank">nishida@sfc.wide.ad.jp</a>]
<br>
<b>Envoy=C3=A9=C2=A0:</b> mercredi 3 avril 2019 00:02<br>
<b>=C3=80=C2=A0:</b> BOUCADAIR Mohamed TGI/OLN<br>
<b>Cc=C2=A0:</b> Yoshifumi Nishida; <a href=3D"mailto:tsv-art@ietf.org" tar=
get=3D"_blank">tsv-art@ietf.org</a>; <a href=3D"mailto:draft-ietf-dots-sign=
al-channel.all@ietf.org" target=3D"_blank">draft-ietf-dots-signal-channel.a=
ll@ietf.org</a>; <a href=3D"mailto:ietf@ietf.org" target=3D"_blank">ietf@ie=
tf.org</a>; <a href=3D"mailto:dots@ietf.org" target=3D"_blank">dots@ietf.or=
g</a><br>
<b>Objet=C2=A0:</b> Re: Tsvart last call review of draft-ietf-dots-signal-c=
hannel-31<u></u><u></u></span></p>
</div>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<div>
<div>
<p class=3D"MsoNormal">HI Med,<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Thanks for the reply. I put my comments in lines.<u>=
</u><u></u></p>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<div>
<p class=3D"MsoNormal">On Sun, Mar 31, 2019 at 11:55 PM &lt;<a href=3D"mail=
to:mohamed.boucadair@orange.com" target=3D"_blank">mohamed.boucadair@orange=
.com</a>&gt; wrote:<u></u><u></u></p>
</div>
<blockquote style=3D"border-top:none;border-right:none;border-bottom:none;b=
order-left:1pt solid rgb(204,204,204);padding:0cm 0cm 0cm 6pt;margin-left:4=
.8pt;margin-right:0cm">
<p class=3D"MsoNormal">Hi Yoshi, <br>
<br>
Thank you for the review. <br>
<br>
Please see inline.<br>
<br>
Cheers,<br>
Med<br>
<br>
&gt; -----Message d&#39;origine-----<br>
&gt; De=C2=A0: Yoshifumi Nishida via Datatracker [mailto:<a href=3D"mailto:=
noreply@ietf.org" target=3D"_blank">noreply@ietf.org</a>]<br>
&gt; Envoy=C3=A9=C2=A0: dimanche 31 mars 2019 10:53<br>
&gt; =C3=80=C2=A0: <a href=3D"mailto:tsv-art@ietf.org" target=3D"_blank">ts=
v-art@ietf.org</a><br>
&gt; Cc=C2=A0: <a href=3D"mailto:draft-ietf-dots-signal-channel.all@ietf.or=
g" target=3D"_blank">
draft-ietf-dots-signal-channel.all@ietf.org</a>; <a href=3D"mailto:ietf@iet=
f.org" target=3D"_blank">
ietf@ietf.org</a>;<br>
&gt; <a href=3D"mailto:dots@ietf.org" target=3D"_blank">dots@ietf.org</a><b=
r>
&gt; Objet=C2=A0: Tsvart last call review of draft-ietf-dots-signal-channel=
-31<br>
&gt; <br>
&gt; Reviewer: Yoshifumi Nishida<br>
&gt; Review result: Almost Ready<br>
&gt; <br>
&gt; This document has been reviewed as part of the transport area review t=
eam&#39;s<br>
&gt; ongoing effort to review key IETF documents. These comments were writt=
en<br>
&gt; primarily for the transport area directors, but are copied to the docu=
ment&#39;s<br>
&gt; authors and WG to allow them to address any issues raised and also to =
the<br>
&gt; IETF<br>
&gt; discussion list for information.<br>
&gt; <br>
&gt; When done at the time of IETF Last Call, the authors should consider t=
his<br>
&gt; review as part of the last-call comments they receive. Please always C=
C<br>
&gt; <a href=3D"mailto:tsv-art@ietf.org" target=3D"_blank">tsv-art@ietf.org=
</a> if you reply to or forward this review.<br>
&gt; <br>
&gt; Summary: This document is almost ready for publication, but it will be=
 better<br>
&gt; to clarify the following points.<br>
&gt; <br>
&gt; 1:=C2=A0 =C2=A0&quot;it is out of scope of this document to specify th=
e behavior to be<br>
&gt; followed by a DOTS client to send DOTS requests when multiple<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0DOTS servers are provisioned.&quot;<b=
r>
&gt; <br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0I&#39;m not sure why it is out of scope. Doe=
s it bring a certain<br>
&gt; complexities<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0to the protocol?<br>
&gt;=C2=A0 =C2=A0 =C2=A0 Or, does it simply mean it is up to implementation=
s?<br>
<br>
[Med] This is because of specific considerations such as those discussed in=
 draft-ietf-dots-multihoming. We don&#39;t want to overload the base spec w=
ith such considerations (discussed in separate documents). The same approac=
h is followed for server discovery (draft-ietf-dots-server-discovery).
<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Got it. I think it would be useful for readers to me=
ntion it in the draft.=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:&quot;Cour=
ier New&quot;;color:black"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10pt;font-fa=
mily:&quot;Courier New&quot;;color:black">[Med] I updated the text as follo=
ws=C2=A0:
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10pt;font-fa=
mily:&quot;Courier New&quot;;color:black"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10pt;font-fa=
mily:&quot;Courier New&quot;">=C2=A0=C2=A0 Likewise, it is out of scope of =
this document to specify the behavior<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10pt;font-fa=
mily:&quot;Courier New&quot;">=C2=A0=C2=A0 to be followed by a DOTS client =
to send DOTS requests when multiple<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10pt;font-fa=
mily:&quot;Courier New&quot;">=C2=A0=C2=A0 DOTS servers are provisioned (e.=
g., contact all DOTS servers, select<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10pt;font-fa=
mily:&quot;Courier New&quot;">=C2=A0=C2=A0 one DOTS server among the list).=
=C2=A0 Such behavior is specified in other<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10pt;font-fa=
mily:&quot;Courier New&quot;">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10pt;font-fa=
mily:&quot;Courier New&quot;">=C2=A0=C2=A0=C2=A0</span><span style=3D"font-=
size:10pt;font-family:&quot;Courier New&quot;">documents (e.g.,=C2=A0 [I-D.=
ietf-dots-multihoming]).<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:&quot;Cour=
ier New&quot;">=C2=A0=C2=A0^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^</=
span></p></div></div></div></div></div></div></div></blockquote><div><br></=
div><div>WFM. Thanks for the updates!</div><div>=C2=A0<br></div><blockquote=
 class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px so=
lid rgb(204,204,204);padding-left:1ex"><div lang=3D"FR"><div class=3D"m_-78=
84665924730068167gmail-m_6776049339142017523WordSection1"><div style=3D"bor=
der-top:none;border-right:none;border-bottom:none;border-left:1.5pt solid b=
lue;padding:0cm 0cm 0cm 4pt"><div><div><div><div><p class=3D"MsoNormal"><sp=
an style=3D"font-size:10pt;font-family:&quot;Courier New&quot;"><u></u><u><=
/u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10pt;font-fa=
mily:&quot;Courier New&quot;;color:black"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">=C2=A0 =C2=A0<u></u><u></u></sp=
an></p>
</div>
<blockquote style=3D"border-top:none;border-right:none;border-bottom:none;b=
order-left:1pt solid rgb(204,204,204);padding:0cm 0cm 0cm 6pt;margin-left:4=
.8pt;margin-right:0cm">
<p class=3D"MsoNormal">&gt; 2:=C2=A0 =C2=A0&quot;The DOTS client periodical=
ly repeats the mechanism to discover whether<br>
&gt; DOTS signal<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0channel messages with DTLS over UDP b=
ecomes available from the DOTS<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0server..&quot;<br>
&gt; <br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 -&gt; Does this mean DOTS clients will not =
repeat this when it already<br>
&gt; has<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 DTLS over UDP connection?<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 What about if the client has =
DTLS over UDPv4? Does it try to check<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 DTLS over UDPv6? Also, is thi=
s logic MAY or SHOULD or don&#39;t want<br>
&gt; to<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 specify?<br>
<br>
[Med] The client will retry when the cache flushes out:<u></u><u></u></p>
</blockquote>
<blockquote style=3D"border-top:none;border-right:none;border-bottom:none;b=
order-left:1pt solid rgb(204,204,204);padding:0cm 0cm 0cm 6pt;margin-left:4=
.8pt;margin-right:0cm">
<p class=3D"MsoNormal"><br>
=C2=A0 =C2=A0Note that the DOTS client after successfully establishing a<br=
>
=C2=A0 =C2=A0connection MUST cache information regarding the outcome of eac=
h<br>
=C2=A0 =C2=A0connection attempt for a specific time period, and it uses tha=
t<br>
=C2=A0 =C2=A0information to avoid thrashing the network with subsequent att=
empts.<u></u><u></u></p>
</blockquote>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">OK, but if you retry anyway after a certain time, wh=
y do you need to cache the results?<u></u><u></u></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:&quot;Cour=
ier New&quot;;color:black"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10pt;font-fa=
mily:&quot;Courier New&quot;;color:black">[Med] =E2=80=9C</span><span lang=
=3D"EN-US" style=3D"font-size:10pt;font-family:&quot;Courier New&quot;">to =
avoid thrashing the network with subsequent attempts=E2=80=9D as the text s=
ays.
 Also, caching avoids the inconvenience of selection during attack times. T=
ypically, the client executes the HE procedure when it initializes and uses=
 the outcome of the procedure for subsequent DOTS signal exchanges during a=
 certain period. Please refer to
 this text in the draft: =C2=A0=C2=A0</span></p></div></div></div></div></d=
iv></div></div></blockquote><div><br></div><div>Hmm. let&#39;s say the resu=
lts of the happy eyeballs was TCP over IPv4 (just like the figure 4) and th=
e client cache the info.</div><div>After certain period of time, the client=
 will do happy eyeball again because other better connections might be avai=
lable . But, in this case, how the cached info will be used?<br></div><div>=
<br></div><div>It seems that an implementation that doesn&#39;t cache the i=
nfo at all and does happy eyeballs at every 10 hours won&#39;t be allowed i=
n this draft.</div><div><br></div><div>Thanks,</div><div>--</div><div>Yoshi=
</div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;b=
order-left:1px solid rgb(204,204,204);padding-left:1ex"><div lang=3D"FR"><d=
iv class=3D"m_-7884665924730068167gmail-m_6776049339142017523WordSection1">=
<div style=3D"border-top:none;border-right:none;border-bottom:none;border-l=
eft:1.5pt solid blue;padding:0cm 0cm 0cm 4pt"><div><div><div><div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>

</blockquote></div></div>

--0000000000002226380585b6ff04--


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From: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>
To: Yoshifumi Nishida <nishida@sfc.wide.ad.jp>, "mohamed.boucadair@orange.com" <mohamed.boucadair@orange.com>
CC: "ietf@ietf.org" <ietf@ietf.org>, "draft-ietf-dots-signal-channel.all@ietf.org" <draft-ietf-dots-signal-channel.all@ietf.org>, "dots@ietf.org" <dots@ietf.org>, "tsv-art@ietf.org" <tsv-art@ietf.org>, Yoshifumi Nishida <nishida@wide.ad.jp>
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From nobody Sun Apr  7 23:53:58 2019
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From: Yoshifumi Nishida <nishida@sfc.wide.ad.jp>
Date: Sun, 7 Apr 2019 23:53:32 -0700
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To: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@mcafee.com>
Cc: Yoshifumi Nishida <nishida@sfc.wide.ad.jp>,  "mohamed.boucadair@orange.com" <mohamed.boucadair@orange.com>, "ietf@ietf.org" <ietf@ietf.org>,  "draft-ietf-dots-signal-channel.all@ietf.org" <draft-ietf-dots-signal-channel.all@ietf.org>,  "dots@ietf.org" <dots@ietf.org>, "tsv-art@ietf.org" <tsv-art@ietf.org>, Yoshifumi Nishida <nishida@wide.ad.jp>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/dots/P6GxYtOrxrrHTbg9xjSWSTMsVUQ>
Subject: Re: [Dots] Tsvart last call review of draft-ietf-dots-signal-channel-31
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Hi Tiru,

On Thu, Apr 4, 2019 at 10:46 PM Konda, Tirumaleswar Reddy <
TirumaleswarReddy_Konda@mcafee.com> wrote:

> Hmm. let's say the results of the happy eyeballs was TCP over IPv4 (just
> like the figure 4) and the client cache the info.
>
> After certain period of time, the client will do happy eyeball again
> because other better connections might be available . But, in this case,
> how the cached info will be used?
>
>
>
> [TR] The cache expires after a specific time period. If the cache has not
> expired, the client uses the information from the cache. If cache has
> expired, the client performs happy eyeball again.
>
>
>
> It seems that an implementation that doesn't cache the info at all and
> does happy eyeballs at every 10 hours won't be allowed in this draft.
>
>
>
> [TR] No, but if the subsequent attempt is within few seconds after the
> first attempt of happy eyeball, it would trash the network. The endpoint
> may have to re-establish the (D)TLS session within few seconds for several
> reasons (e.g. TLS session got terminated, DOTS server rebooted NAT rebooted
> etc.).
>

Thanks for the explanation. The logic makes sense to me.
I think it would be good to articulate this a bit more in the draft.
For example, the figure 4 example explains the probing period, but doesn't
mention about the cache period.

Thanks,
--
Yoshi

--0000000000002892c70585ff4c89
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<div dir=3D"ltr"><div>Hi Tiru,</div><div><br></div><div class=3D"gmail_quot=
e"><div dir=3D"ltr" class=3D"gmail_attr">On Thu, Apr 4, 2019 at 10:46 PM Ko=
nda, Tirumaleswar Reddy &lt;<a href=3D"mailto:TirumaleswarReddy_Konda@mcafe=
e.com">TirumaleswarReddy_Konda@mcafee.com</a>&gt; wrote:<br></div><blockquo=
te class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px =
solid rgb(204,204,204);padding-left:1ex">





<div lang=3D"EN-US">
<div class=3D"gmail-m_-8350007359414673353WordSection1">
<p class=3D"MsoNormal">Hmm. let&#39;s say the results of the happy eyeballs=
 was TCP over IPv4 (just like the figure 4) and the client cache the info.<=
u></u><u></u></p>
<p class=3D"MsoNormal">After certain period of time, the client will do hap=
py eyeball again because other better connections might be available . But,=
 in this case, how the cached info will be used?<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">[TR] The cache expires after a specific time period.=
 If the cache has not expired, the client uses the information from the cac=
he. If cache has expired, the client performs happy eyeball again.<u></u><u=
></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">It seems that an implementation that doesn&#39;t cac=
he the info at all and does happy eyeballs at every 10 hours won&#39;t be a=
llowed in this draft.<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">[TR] No, but if the subsequent attempt is within few=
 seconds after the first attempt of happy eyeball, it would trash the netwo=
rk. The endpoint may have to re-establish the (D)TLS session within few sec=
onds for several reasons (e.g. TLS
 session got terminated, DOTS server rebooted NAT rebooted etc.).</p></div>=
</div></blockquote><div><br></div><div>Thanks for the explanation. The logi=
c makes sense to me.=C2=A0</div><div>I think it would be good to articulate=
 this a bit more in the draft.</div><div>For example, the figure 4 example =
explains the probing period, but doesn&#39;t mention about the cache period=
.=C2=A0</div><div><br></div><div>Thanks,</div><div>--<br></div><div>Yoshi</=
div><div><br></div><div><br></div><div>=C2=A0</div></div></div>

--0000000000002892c70585ff4c89--


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From: "Xialiang (Frank, Network Standard & Patent Dept)" <frank.xialiang@huawei.com>
To: "dots@ietf.org" <dots@ietf.org>
Thread-Topic: IETF 104th meeting DOTS session minutes is now available:
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Subject: [Dots] IETF 104th meeting DOTS session minutes is now available:
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Hi all,
The IETF 104th meeting DOTS session minutes is published, thanks for Wei Pa=
n's big help!

If you are interested, please read it in the following link:
https://etherpad.ietf.org/p/notes-ietf-104-dots?useMonospaceFont=3Dtrue

Thanks!

B.R.
Frank & Valery

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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span lang=3D"EN-US">Hi all,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">The IETF 104<sup>th</sup> meeti=
ng DOTS session minutes is published, thanks for Wei Pan&#8217;s big help!<=
o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">If you are interested, please r=
ead it in the following link:<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><a href=3D"https://etherpad.iet=
f.org/p/notes-ietf-104-dots?useMonospaceFont=3Dtrue">https://etherpad.ietf.=
org/p/notes-ietf-104-dots?useMonospaceFont=3Dtrue</a><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Thanks!<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">B.R.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Frank &amp; Valery<o:p></o:p></=
span></p>
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From: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>
To: Yoshifumi Nishida <nishida@sfc.wide.ad.jp>
CC: "mohamed.boucadair@orange.com" <mohamed.boucadair@orange.com>, "ietf@ietf.org" <ietf@ietf.org>, "draft-ietf-dots-signal-channel.all@ietf.org" <draft-ietf-dots-signal-channel.all@ietf.org>, "dots@ietf.org" <dots@ietf.org>, "tsv-art@ietf.org" <tsv-art@ietf.org>, Yoshifumi Nishida <nishida@wide.ad.jp>
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Subject: Re: [Dots] Tsvart last call review of draft-ietf-dots-signal-channel-31
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From: "Valery Smyslov" <valery@smyslov.net>
To: <dots@ietf.org>
Cc: <dots-chairs@ietf.org>, <kaduk@mit.edu>
Date: Mon, 8 Apr 2019 18:28:48 +0300
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Subject: [Dots] Adoption call for draft-nishizuka-dots-signal-control-filtering-06
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Hi all,

the chairs recently received an adoption request for draft-nishizuka-dots-signal-control-filtering-06.

This message starts a two-week adoption call for draft-nishizuka-dots-signal-control-filtering-06.
The call ends up on Tuesday, April the 23rd.

Please send your opinion regarding adoption of this document to the list before this date.
If you think the draft should be adopted, please indicate whether you're willing 
to review it/to work on it. If you think the draft should not be adopted, please explain why.

Regards,
Frank & Valery.



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From: "Valery Smyslov" <valery@smyslov.net>
To: <dots@ietf.org>
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Date: Mon, 8 Apr 2019 18:28:45 +0300
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Subject: [Dots] Adoption call for draft-reddy-dots-home-network-04
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Hi all,

the chairs recently received an adoption request for draft-reddy-dots-home-network-04.

This message starts a two-week adoption call for draft-reddy-dots-home-network-04.
The call ends up on Tuesday, April the 23rd.

Please send your opinion regarding adoption of this document to the list before this date.
If you think the draft should be adopted, please indicate whether you're willing 
to review it/to work on it. If you think the draft should not be adopted, please explain why.

Regards,
Frank & Valery.



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From: "Teague, Nik" <nteague@Verisign.com>
To: Valery Smyslov <valery@smyslov.net>, "dots@ietf.org" <dots@ietf.org>
CC: "dots-chairs@ietf.org" <dots-chairs@ietf.org>, "kaduk@mit.edu" <kaduk@mit.edu>
Thread-Topic: [EXTERNAL] [Dots] Adoption call for draft-nishizuka-dots-signal-control-filtering-06
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Subject: Re: [Dots] Adoption call for draft-nishizuka-dots-signal-control-filtering-06
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Hi,

I support adoption of this draft.

Thanks,

-Nik

> -----Original Message-----
> From: Dots <dots-bounces@ietf.org> On Behalf Of Valery Smyslov
> Sent: Monday, April 08, 2019 4:29 PM
> To: dots@ietf.org
> Cc: dots-chairs@ietf.org; kaduk@mit.edu
> Subject: [EXTERNAL] [Dots] Adoption call for draft-nishizuka-dots-signal-
> control-filtering-06
>=20
> Hi all,
>=20
> the chairs recently received an adoption request for draft-nishizuka-dots=
-
> signal-control-filtering-06.
>=20
> This message starts a two-week adoption call for draft-nishizuka-dots-sig=
nal-
> control-filtering-06.
> The call ends up on Tuesday, April the 23rd.
>=20
> Please send your opinion regarding adoption of this document to the list
> before this date.
> If you think the draft should be adopted, please indicate whether you're
> willing to review it/to work on it. If you think the draft should not be
> adopted, please explain why.
>=20
> Regards,
> Frank & Valery.
>=20
>=20
> _______________________________________________
> Dots mailing list
> Dots@ietf.org
> https://www.ietf.org/mailman/listinfo/dots


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From: "Teague, Nik" <nteague@Verisign.com>
To: Valery Smyslov <valery@smyslov.net>, "dots@ietf.org" <dots@ietf.org>
CC: "dots-chairs@ietf.org" <dots-chairs@ietf.org>, "kaduk@mit.edu" <kaduk@mit.edu>
Thread-Topic: [EXTERNAL] [Dots] Adoption call for draft-reddy-dots-home-network-04
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Date: Mon, 8 Apr 2019 15:32:20 +0000
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Subject: Re: [Dots] Adoption call for draft-reddy-dots-home-network-04
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Hi,

I support adoption of this draft.

Thanks,

-Nik

> -----Original Message-----
> From: Dots <dots-bounces@ietf.org> On Behalf Of Valery Smyslov
> Sent: Monday, April 08, 2019 4:29 PM
> To: dots@ietf.org
> Cc: dots-chairs@ietf.org; kaduk@mit.edu
> Subject: [EXTERNAL] [Dots] Adoption call for draft-reddy-dots-home-networ=
k-
> 04
>=20
> Hi all,
>=20
> the chairs recently received an adoption request for draft-reddy-dots-hom=
e-
> network-04.
>=20
> This message starts a two-week adoption call for draft-reddy-dots-home-
> network-04.
> The call ends up on Tuesday, April the 23rd.
>=20
> Please send your opinion regarding adoption of this document to the list
> before this date.
> If you think the draft should be adopted, please indicate whether you're
> willing to review it/to work on it. If you think the draft should not be
> adopted, please explain why.
>=20
> Regards,
> Frank & Valery.
>=20
>=20
> _______________________________________________
> Dots mailing list
> Dots@ietf.org
> https://www.ietf.org/mailman/listinfo/dots


From nobody Mon Apr  8 08:51:20 2019
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From: "Jon Shallow" <supjps-ietf@jpshallow.com>
To: "'Valery Smyslov'" <valery@smyslov.net>, <dots@ietf.org>, <dots-chairs@ietf.org>, <kaduk@mit.edu>
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Subject: Re: [Dots] Adoption call for draft-reddy-dots-home-network-04
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Hi,

As an author, I obviously support the adoption of this draft

Regards

Jon

> -----Original Message-----
> From: Dots [mailto:ietf-supjps-dots-bounces@ietf.org] On Behalf Of Valery
> Smyslov
> Sent: 08 April 2019 16:29
> To: dots@ietf.org
> Cc: dots-chairs@ietf.org; kaduk@mit.edu
> Subject: [Dots] Adoption call for draft-reddy-dots-home-network-04
> 
> Hi all,
> 
> the chairs recently received an adoption request for
draft-reddy-dots-home-
> network-04.
> 
> This message starts a two-week adoption call for draft-reddy-dots-home-
> network-04.
> The call ends up on Tuesday, April the 23rd.
> 
> Please send your opinion regarding adoption of this document to the list
> before this date.
> If you think the draft should be adopted, please indicate whether you're
> willing
> to review it/to work on it. If you think the draft should not be adopted,
> please explain why.
> 
> Regards,
> Frank & Valery.
> 
> 
> _______________________________________________
> Dots mailing list
> Dots@ietf.org
> https://www.ietf.org/mailman/listinfo/dots


From nobody Mon Apr  8 08:52:01 2019
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From: "Jon Shallow" <supjps-ietf@jpshallow.com>
To: "'Valery Smyslov'" <valery@smyslov.net>, <dots@ietf.org>, <dots-chairs@ietf.org>, <kaduk@mit.edu>
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Subject: Re: [Dots] Adoption call for draft-nishizuka-dots-signal-control-filtering-06
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Hi,

I support the adoption of this draft

Regards

Jon

> -----Original Message-----
> From: Dots [mailto: dots-bounces@ietf.org] On Behalf Of Valery
> Smyslov
> Sent: 08 April 2019 16:29
> To: dots@ietf.org
> Cc: dots-chairs@ietf.org; kaduk@mit.edu
> Subject: [Dots] Adoption call for
draft-nishizuka-dots-signal-control-filtering-
> 06
> 
> Hi all,
> 
> the chairs recently received an adoption request for draft-nishizuka-dots-
> signal-control-filtering-06.
> 
> This message starts a two-week adoption call for
draft-nishizuka-dots-signal-
> control-filtering-06.
> The call ends up on Tuesday, April the 23rd.
> 
> Please send your opinion regarding adoption of this document to the list
> before this date.
> If you think the draft should be adopted, please indicate whether you're
> willing
> to review it/to work on it. If you think the draft should not be adopted,
> please explain why.
> 
> Regards,
> Frank & Valery.
> 
> 
> _______________________________________________
> Dots mailing list
> Dots@ietf.org
> https://www.ietf.org/mailman/listinfo/dots


From nobody Mon Apr  8 17:19:56 2019
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Subject: Re: [Dots] Adoption call for draft-reddy-dots-home-network-04
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Hi,

I support adoption of this draft.

Thanks,

Yuhei

-----Original Message-----
From: Dots [mailto:dots-bounces@ietf.org] On Behalf Of Valery Smyslov
Sent: Tuesday, April 09, 2019 12:29 AM
To: dots@ietf.org
Cc: dots-chairs@ietf.org; kaduk@mit.edu
Subject: [Dots] Adoption call for draft-reddy-dots-home-network-04

Hi all,

the chairs recently received an adoption request for draft-reddy-dots-home-network-04.

This message starts a two-week adoption call for draft-reddy-dots-home-network-04.
The call ends up on Tuesday, April the 23rd.

Please send your opinion regarding adoption of this document to the list before this date.
If you think the draft should be adopted, please indicate whether you're willing 
to review it/to work on it. If you think the draft should not be adopted, please explain why.

Regards,
Frank & Valery.


_______________________________________________
Dots mailing list
Dots@ietf.org
https://www.ietf.org/mailman/listinfo/dots


From nobody Mon Apr  8 23:56:46 2019
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From: Yoshifumi Nishida <nishida@sfc.wide.ad.jp>
Date: Mon, 8 Apr 2019 23:56:24 -0700
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To: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@mcafee.com>
Cc: Yoshifumi Nishida <nishida@sfc.wide.ad.jp>,  "mohamed.boucadair@orange.com" <mohamed.boucadair@orange.com>, "ietf@ietf.org" <ietf@ietf.org>,  "draft-ietf-dots-signal-channel.all@ietf.org" <draft-ietf-dots-signal-channel.all@ietf.org>,  "dots@ietf.org" <dots@ietf.org>, "tsv-art@ietf.org" <tsv-art@ietf.org>, Yoshifumi Nishida <nishida@wide.ad.jp>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/dots/l3zZdKneD4axU3KsJqtXV1pbR7U>
Subject: Re: [Dots] Tsvart last call review of draft-ietf-dots-signal-channel-31
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--00000000000039e378058613741f
Content-Type: text/plain; charset="UTF-8"

Hi Tiru,

I put my comments in lines.

On Mon, Apr 8, 2019 at 1:40 AM Konda, Tirumaleswar Reddy <
TirumaleswarReddy_Konda@mcafee.com> wrote:

> Hi Yoshi,
>
>
>
> Please see inline [TR2]
>
>
>
> *From:* Yoshifumi Nishida <nishida@sfc.wide.ad.jp>
> *Sent:* Monday, April 8, 2019 12:24 PM
> *To:* Konda, Tirumaleswar Reddy <TirumaleswarReddy_Konda@McAfee.com>
> *Cc:* Yoshifumi Nishida <nishida@sfc.wide.ad.jp>;
> mohamed.boucadair@orange.com; ietf@ietf.org;
> draft-ietf-dots-signal-channel.all@ietf.org; dots@ietf.org;
> tsv-art@ietf.org; Yoshifumi Nishida <nishida@wide.ad.jp>
> *Subject:* Re: [Dots] Tsvart last call review of
> draft-ietf-dots-signal-channel-31
>
>
>
> *CAUTION*: External email. Do not click links or open attachments unless
> you recognize the sender and know the content is safe.
> ------------------------------
>
> Hi Tiru,
>
>
>
> On Thu, Apr 4, 2019 at 10:46 PM Konda, Tirumaleswar Reddy <
> TirumaleswarReddy_Konda@mcafee.com> wrote:
>
> Hmm. let's say the results of the happy eyeballs was TCP over IPv4 (just
> like the figure 4) and the client cache the info.
>
> After certain period of time, the client will do happy eyeball again
> because other better connections might be available . But, in this case,
> how the cached info will be used?
>
>
>
> [TR] The cache expires after a specific time period. If the cache has not
> expired, the client uses the information from the cache. If cache has
> expired, the client performs happy eyeball again.
>
>
>
> It seems that an implementation that doesn't cache the info at all and
> does happy eyeballs at every 10 hours won't be allowed in this draft.
>
>
>
> [TR] No, but if the subsequent attempt is within few seconds after the
> first attempt of happy eyeball, it would trash the network. The endpoint
> may have to re-establish the (D)TLS session within few seconds for several
> reasons (e.g. TLS session got terminated, DOTS server rebooted NAT rebooted
> etc.).
>
>
>
> Thanks for the explanation. The logic makes sense to me.
>
> I think it would be good to articulate this a bit more in the draft.
>
> For example, the figure 4 example explains the probing period, but doesn't
> mention about the cache period.
>
>
>
> [TR2]
>
> Sure, we can update the text as follows:
>
>
>
> Note that the DOTS client after successfully establishing a connection
> MUST cache information regarding the outcome of each
>
> connection attempt and the cached information should be flushed when its
> age exceeds a system-defined maximum on the order of few minutes (e.g. 2
> minutes).
>
> If the DOTS client has to re-establish the connection with the DOTS server
> within few seconds after the Happy Eyeballs mechanism is complete,
>
>   caching avoids trashing the network in the presence of DDoS attack
> traffic.
>

Thanks for the updates. But, one thing.. The text suggests cache period
would be the order of few minutes.
But, this value seems to be much smaller compared to "probing SHOULD NOT be
done more than every 24 hours".
--
Yoshi

--00000000000039e378058613741f
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div dir=3D"ltr"><div>Hi Tiru,</div><div><br></div><div>I =
put my comments in lines.</div><div><br></div><div class=3D"gmail_quote"><d=
iv dir=3D"ltr" class=3D"gmail_attr">On Mon, Apr 8, 2019 at 1:40 AM Konda, T=
irumaleswar Reddy &lt;<a href=3D"mailto:TirumaleswarReddy_Konda@mcafee.com"=
>TirumaleswarReddy_Konda@mcafee.com</a>&gt; wrote:<br></div><blockquote cla=
ss=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid =
rgb(204,204,204);padding-left:1ex">





<div lang=3D"EN-US">
<div class=3D"gmail-m_-6254068348236482764WordSection1">
<p class=3D"MsoNormal">Hi Yoshi,<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">Please see inline [TR2]<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div style=3D"border-top:none;border-right:none;border-bottom:none;border-l=
eft:1.5pt solid blue;padding:0in 0in 0in 4pt">
<div>
<div style=3D"border-right:none;border-bottom:none;border-left:none;border-=
top:1pt solid rgb(225,225,225);padding:3pt 0in 0in">
<p class=3D"MsoNormal"><b>From:</b> Yoshifumi Nishida &lt;<a href=3D"mailto=
:nishida@sfc.wide.ad.jp" target=3D"_blank">nishida@sfc.wide.ad.jp</a>&gt; <=
br>
<b>Sent:</b> Monday, April 8, 2019 12:24 PM<br>
<b>To:</b> Konda, Tirumaleswar Reddy &lt;TirumaleswarReddy_Konda@McAfee.com=
&gt;<br>
<b>Cc:</b> Yoshifumi Nishida &lt;<a href=3D"mailto:nishida@sfc.wide.ad.jp" =
target=3D"_blank">nishida@sfc.wide.ad.jp</a>&gt;; <a href=3D"mailto:mohamed=
.boucadair@orange.com" target=3D"_blank">mohamed.boucadair@orange.com</a>; =
<a href=3D"mailto:ietf@ietf.org" target=3D"_blank">ietf@ietf.org</a>; <a hr=
ef=3D"mailto:draft-ietf-dots-signal-channel.all@ietf.org" target=3D"_blank"=
>draft-ietf-dots-signal-channel.all@ietf.org</a>; <a href=3D"mailto:dots@ie=
tf.org" target=3D"_blank">dots@ietf.org</a>; <a href=3D"mailto:tsv-art@ietf=
.org" target=3D"_blank">tsv-art@ietf.org</a>; Yoshifumi Nishida &lt;<a href=
=3D"mailto:nishida@wide.ad.jp" target=3D"_blank">nishida@wide.ad.jp</a>&gt;=
<br>
<b>Subject:</b> Re: [Dots] Tsvart last call review of draft-ietf-dots-signa=
l-channel-31<u></u><u></u></p>
</div>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<table class=3D"gmail-m_-6254068348236482764MsoNormalTable" border=3D"1" ce=
llpadding=3D"0" style=3D"background:rgb(243,255,51);border:1.5pt solid rgb(=
155,154,135)">
<tbody>
<tr>
<td style=3D"border:none;padding:0.75pt">
<p><strong><span style=3D"font-size:10pt;font-family:Arial,sans-serif;color=
:rgb(155,139,62)">CAUTION</span></strong><span style=3D"font-size:10pt;font=
-family:Arial,sans-serif;color:rgb(155,139,62)">:</span><span style=3D"font=
-size:10pt;font-family:Arial,sans-serif;color:black">
 External email. Do not click links or open attachments unless you recogniz=
e the sender and know the content is safe.</span><span style=3D"font-size:1=
0pt;font-family:Arial,sans-serif"><u></u><u></u></span></p>
</td>
</tr>
</tbody>
</table>
<div class=3D"MsoNormal" align=3D"center" style=3D"text-align:center">
<hr size=3D"2" width=3D"100%" align=3D"center">
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal">Hi Tiru,<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<div>
<p class=3D"MsoNormal">On Thu, Apr 4, 2019 at 10:46 PM Konda, Tirumaleswar =
Reddy &lt;<a href=3D"mailto:TirumaleswarReddy_Konda@mcafee.com" target=3D"_=
blank">TirumaleswarReddy_Konda@mcafee.com</a>&gt; wrote:<u></u><u></u></p>
</div>
<blockquote style=3D"border-top:none;border-right:none;border-bottom:none;b=
order-left:1pt solid rgb(204,204,204);padding:0in 0in 0in 6pt;margin:5pt 0i=
n 5pt 4.8pt">
<div>
<div>
<p class=3D"MsoNormal">Hmm. let&#39;s say the results of the happy eyeballs=
 was TCP over IPv4 (just like the figure 4) and the client cache the info.<=
u></u><u></u></p>
<p class=3D"MsoNormal">After certain period of time, the client will do hap=
py eyeball again because other better connections might be available . But,=
 in this case, how the cached info will be used?<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">[TR] The cache expires after a specific time period.=
 If the cache has not expired, the client uses the information from the cac=
he. If cache has expired, the client performs happy
 eyeball again.<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">It seems that an implementation that doesn&#39;t cac=
he the info at all and does happy eyeballs at every 10 hours won&#39;t be a=
llowed in this draft.<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">[TR] No, but if the subsequent attempt is within few=
 seconds after the first attempt of happy eyeball, it would trash the netwo=
rk. The endpoint may have to re-establish the (D)TLS
 session within few seconds for several reasons (e.g. TLS session got termi=
nated, DOTS server rebooted NAT rebooted etc.).<u></u><u></u></p>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Thanks for the explanation. The logic makes sense to=
 me.=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">I think it would be good to articulate this a bit mo=
re in the draft.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">For example, the figure 4 example explains the probi=
ng period, but doesn&#39;t mention about the cache period.=C2=A0<u></u><u><=
/u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">[TR2]<u></u><u></u></p>
<p class=3D"MsoNormal">Sure, we can update the text as follows:<u></u><u></=
u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal" style=3D"margin-left:4.75pt">Note that the DOTS clie=
nt after successfully establishing a connection MUST cache information rega=
rding the outcome of each<u></u><u></u></p>
<p class=3D"MsoNormal" style=3D"margin-left:4.75pt">connection attempt and =
the cached information should be flushed when its age exceeds a system-defi=
ned maximum on the order of few minutes (e.g. 2 minutes).
<u></u><u></u></p>
<p class=3D"MsoNormal" style=3D"margin-left:4.75pt">If the DOTS client has =
to re-establish the connection with the DOTS server within few seconds afte=
r the Happy Eyeballs mechanism is complete,
<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0=C2=A0caching avoids trashing the network in t=
he presence of DDoS attack traffic.=C2=A0</p></div></div></div></div></div>=
</div></blockquote><div><br></div><div>Thanks for the updates. But, one thi=
ng.. The text suggests cache period would be the order of few minutes.</div=
><div>But, this value seems to be much smaller compared to &quot;<span styl=
e=3D"color:rgb(0,0,0)">probing SHOULD NOT be done more than every 24 hours&=
quot;.</span><span style=3D"color:rgb(0,0,0)"></span></div><div><span style=
=3D"color:rgb(0,0,0)">--</span></div><div><span style=3D"color:rgb(0,0,0)">=
Yoshi</span></div></div></div></div>

--00000000000039e378058613741f--


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From: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>
To: Yoshifumi Nishida <nishida@sfc.wide.ad.jp>
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Thread-Topic: [Dots] Tsvart last call review of draft-ietf-dots-signal-channel-31
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Subject: Re: [Dots] Tsvart last call review of draft-ietf-dots-signal-channel-31
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From nobody Tue Apr  9 09:27:54 2019
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From: The IESG <iesg-secretary@ietf.org>
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Cc: The IESG <iesg@ietf.org>, dots@ietf.org, frank.xialiang@huawei.com, kaduk@mit.edu, dots-chairs@ietf.org, rfc-editor@rfc-editor.org, draft-ietf-dots-requirements@ietf.org, Liang Xia <frank.xialiang@huawei.com>
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Subject: [Dots] Document Action: 'Distributed Denial of Service (DDoS) Open Threat Signaling Requirements' to Informational RFC (draft-ietf-dots-requirements-22.txt)
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The IESG has approved the following document:
- 'Distributed Denial of Service (DDoS) Open Threat Signaling
   Requirements'
  (draft-ietf-dots-requirements-22.txt) as Informational RFC

This document is the product of the DDoS Open Threat Signaling Working Group.

The IESG contact persons are Benjamin Kaduk and Roman Danyliw.

A URL of this Internet Draft is:
https://datatracker.ietf.org/doc/draft-ietf-dots-requirements/





Technical Summary

This document defines the requirements for the Distributed Denial of Service (DDoS) Open Threat Signaling (DOTS) protocols enabling coordinated response to DDoS attacks. The working group has the consensus to publish it as an informational RFC since it is a requirements draft.

Working Group Summary

This document has been extensively reviewed and discussed within the working
group by mailing list and github, and all technical issues raised have been
resolved, most of them are before the -10 version.  After long term discussion
among the WG and enough iterations of updates, the draft is mature enough and
there is strong consensus in the WG to advance to publication.

Document Quality

The co-authors are from leading vendors in DDoS protection industry with
extensive experience with the related technologies and implementations; they
are also the core authors of the DOTS protocol WG drafts, which guarantees
consistency among the requirements draft with them.  This draft covers
different categories of requirements for: general, signal channel, data
channel, security and data model. The signal channel requirements are the most
important and complex, as it works during the attack time and thus requires the
highest resilience, efficiency and fault tolerance. Specially, the heartbeat
handling (SIG-004) and NAT traversal (SIG-010) issues are considered highly
complicated as they include many corner cases, and are discussed mostly in the
WG. So, careful review of them is needed.

Personnel

The document shepherd is Liang Xia. The responsible Area Director is Benjamin Kaduk.


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From: "Prashanth Patil (praspati)" <praspati@cisco.com>
To: Valery Smyslov <valery@smyslov.net>, "dots@ietf.org" <dots@ietf.org>
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Thread-Topic: [Dots] Adoption call for draft-reddy-dots-home-network-04
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From: Andrew Mortensen <andrewmortensen@gmail.com>
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Subject: Re: [Dots] Adoption call for draft-reddy-dots-home-network-04
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I support adoption of this draft.

> On Apr 8, 2019, at 11:28 AM, Valery Smyslov <valery@smyslov.net> =
wrote:
>=20
> Hi all,
>=20
> the chairs recently received an adoption request for =
draft-reddy-dots-home-network-04.
>=20
> This message starts a two-week adoption call for =
draft-reddy-dots-home-network-04.
> The call ends up on Tuesday, April the 23rd.
>=20
> Please send your opinion regarding adoption of this document to the =
list before this date.
> If you think the draft should be adopted, please indicate whether =
you're willing=20
> to review it/to work on it. If you think the draft should not be =
adopted, please explain why.
>=20
> Regards,
> Frank & Valery.
>=20
>=20
> _______________________________________________
> Dots mailing list
> Dots@ietf.org
> https://www.ietf.org/mailman/listinfo/dots


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From: Andrew Mortensen <andrewmortensen@gmail.com>
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Date: Wed, 10 Apr 2019 10:35:49 -0400
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Subject: Re: [Dots] Adoption call for draft-nishizuka-dots-signal-control-filtering-06
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I support adoption of this draft.

> On Apr 8, 2019, at 11:28 AM, Valery Smyslov <valery@smyslov.net> =
wrote:
>=20
> Hi all,
>=20
> the chairs recently received an adoption request for =
draft-nishizuka-dots-signal-control-filtering-06.
>=20
> This message starts a two-week adoption call for =
draft-nishizuka-dots-signal-control-filtering-06.
> The call ends up on Tuesday, April the 23rd.
>=20
> Please send your opinion regarding adoption of this document to the =
list before this date.
> If you think the draft should be adopted, please indicate whether =
you're willing=20
> to review it/to work on it. If you think the draft should not be =
adopted, please explain why.
>=20
> Regards,
> Frank & Valery.
>=20
>=20
> _______________________________________________
> Dots mailing list
> Dots@ietf.org
> https://www.ietf.org/mailman/listinfo/dots


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From: Yoshifumi Nishida <nishida@sfc.wide.ad.jp>
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To: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@mcafee.com>
Cc: Yoshifumi Nishida <nishida@sfc.wide.ad.jp>, "ietf@ietf.org" <ietf@ietf.org>, "draft-ietf-dots-signal-channel.all@ietf.org" <draft-ietf-dots-signal-channel.all@ietf.org>,  "dots@ietf.org" <dots@ietf.org>, "tsv-art@ietf.org" <tsv-art@ietf.org>,  "mohamed.boucadair@orange.com" <mohamed.boucadair@orange.com>, Yoshifumi Nishida <nishida@wide.ad.jp>
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Subject: Re: [Dots] Tsvart last call review of draft-ietf-dots-signal-channel-31
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Hi Tiru,

On Tue, Apr 9, 2019 at 1:26 AM Konda, Tirumaleswar Reddy <
TirumaleswarReddy_Konda@mcafee.com> wrote:

> Please see inline [TR3]
>
>
>
> *From:* Dots <dots-bounces@ietf.org> *On Behalf Of * Yoshifumi Nishida
> *Sent:* Tuesday, April 9, 2019 12:26 PM
> *To:* Konda, Tirumaleswar Reddy <TirumaleswarReddy_Konda@McAfee.com>
> *Cc:* ietf@ietf.org; Yoshifumi Nishida <nishida@sfc.wide.ad.jp>;
> draft-ietf-dots-signal-channel.all@ietf.org; dots@ietf.org;
> tsv-art@ietf.org; mohamed.boucadair@orange.com; Yoshifumi Nishida <
> nishida@wide.ad.jp>
> *Subject:* Re: [Dots] Tsvart last call review of
> draft-ietf-dots-signal-channel-31
>
>
>
> *CAUTION*: External email. Do not click links or open attachments unless
> you recognize the sender and know the content is safe.
> ------------------------------
>
> Hi Tiru,
>
>
>
> I put my comments in lines.
>
>
>
> On Mon, Apr 8, 2019 at 1:40 AM Konda, Tirumaleswar Reddy <
> TirumaleswarReddy_Konda@mcafee.com> wrote:
>
> Hi Yoshi,
>
>
>
> Please see inline [TR2]
>
>
>
> *From:* Yoshifumi Nishida <nishida@sfc.wide.ad.jp>
> *Sent:* Monday, April 8, 2019 12:24 PM
> *To:* Konda, Tirumaleswar Reddy <TirumaleswarReddy_Konda@McAfee.com>
> *Cc:* Yoshifumi Nishida <nishida@sfc.wide.ad.jp>;
> mohamed.boucadair@orange.com <mohamed..boucadair@orange.com>;
> ietf@ietf.org; draft-ietf-dots-signal-channel.all@ietf.org; dots@ietf.org;
> tsv-art@ietf.org <tsv-art@ietf..org>; Yoshifumi Nishida <
> nishida@wide.ad.jp>
> *Subject:* Re: [Dots] Tsvart last call review of
> draft-ietf-dots-signal-channel-31
>
>
>
> *CAUTION*: External email. Do not click links or open attachments unless
> you recognize the sender and know the content is safe.
> ------------------------------
>
> Hi Tiru,
>
>
>
> On Thu, Apr 4, 2019 at 10:46 PM Konda, Tirumaleswar Reddy <
> TirumaleswarReddy_Konda@mcafee.com> wrote:
>
> Hmm. let's say the results of the happy eyeballs was TCP over IPv4 (just
> like the figure 4) and the client cache the info.
>
> After certain period of time, the client will do happy eyeball again
> because other better connections might be available . But, in this case,
> how the cached info will be used?
>
>
>
> [TR] The cache expires after a specific time period. If the cache has not
> expired, the client uses the information from the cache. If cache has
> expired, the client performs happy eyeball again.
>
>
>
> It seems that an implementation that doesn't cache the info at all and
> does happy eyeballs at every 10 hours won't be allowed in this draft.
>
>
>
> [TR] No, but if the subsequent attempt is within few seconds after the
> first attempt of happy eyeball, it would trash the network. The endpoint
> may have to re-establish the (D)TLS session within few seconds for several
> reasons (e.g. TLS session got terminated, DOTS server rebooted NAT rebooted
> etc.).
>
>
>
> Thanks for the explanation. The logic makes sense to me.
>
> I think it would be good to articulate this a bit more in the draft.
>
> For example, the figure 4 example explains the probing period, but doesn't
> mention about the cache period.
>
>
>
> [TR2]
>
> Sure, we can update the text as follows:
>
>
>
> Note that the DOTS client after successfully establishing a connection
> MUST cache information regarding the outcome of each
>
> connection attempt and the cached information should be flushed when its
> age exceeds a system-defined maximum on the order of few minutes (e.g. 2
> minutes).
>
> If the DOTS client has to re-establish the connection with the DOTS server
> within few seconds after the Happy Eyeballs mechanism is complete,
>
>   caching avoids trashing the network in the presence of DDoS attack
> traffic.
>
>
>
> Thanks for the updates. But, one thing.. The text suggests cache period
> would be the order of few minutes.
>
> But, this value seems to be much smaller compared to "probing SHOULD NOT
> be done more than every 24 hours".
>
>
>
> [TR3] The probing is for a scenario where the client is using TLS (over
> TCP) for the signal channel and probes to check if DTLS (over UDP) becomes
> available. If the probing finds DTLS over UDP is available, the client
> disconnects the TLS over TCP and re-connects to the server using DTLS over
> UDP transport.
>

Thanks for explanation.
OK. so, probing and cache is irrelevant. I have thought about if this is
confusing or not for a bit. But, I think it's ok after I re-read the text.
I don't have any more comments.
Thanks,
--
Yoshi

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<div dir=3D"ltr"><div>Hi Tiru,</div><div><br></div><div class=3D"gmail_quot=
e"><div dir=3D"ltr" class=3D"gmail_attr">On Tue, Apr 9, 2019 at 1:26 AM Kon=
da, Tirumaleswar Reddy &lt;<a href=3D"mailto:TirumaleswarReddy_Konda@mcafee=
.com" target=3D"_blank">TirumaleswarReddy_Konda@mcafee.com</a>&gt; wrote:<b=
r></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex=
;border-left:1px solid rgb(204,204,204);padding-left:1ex">





<div lang=3D"EN-US">
<div class=3D"m_-7930558519819151123m_5520932283899496875gmail-m_3549595401=
067958495WordSection1">
<p class=3D"MsoNormal">Please see inline [TR3]<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div style=3D"border-top:none;border-right:none;border-bottom:none;border-l=
eft:1.5pt solid blue;padding:0in 0in 0in 4pt">
<div>
<div style=3D"border-right:none;border-bottom:none;border-left:none;border-=
top:1pt solid rgb(225,225,225);padding:3pt 0in 0in">
<p class=3D"MsoNormal"><b>From:</b> Dots &lt;<a href=3D"mailto:dots-bounces=
@ietf.org" target=3D"_blank">dots-bounces@ietf.org</a>&gt; <b>On Behalf Of =
</b>
Yoshifumi Nishida<br>
<b>Sent:</b> Tuesday, April 9, 2019 12:26 PM<br>
<b>To:</b> Konda, Tirumaleswar Reddy &lt;TirumaleswarReddy_Konda@McAfee.com=
&gt;<br>
<b>Cc:</b> <a href=3D"mailto:ietf@ietf.org" target=3D"_blank">ietf@ietf.org=
</a>; Yoshifumi Nishida &lt;<a href=3D"mailto:nishida@sfc.wide.ad.jp" targe=
t=3D"_blank">nishida@sfc.wide.ad.jp</a>&gt;; <a href=3D"mailto:draft-ietf-d=
ots-signal-channel.all@ietf.org" target=3D"_blank">draft-ietf-dots-signal-c=
hannel.all@ietf.org</a>; <a href=3D"mailto:dots@ietf.org" target=3D"_blank"=
>dots@ietf.org</a>; <a href=3D"mailto:tsv-art@ietf.org" target=3D"_blank">t=
sv-art@ietf.org</a>; <a href=3D"mailto:mohamed.boucadair@orange.com" target=
=3D"_blank">mohamed.boucadair@orange.com</a>; Yoshifumi Nishida &lt;<a href=
=3D"mailto:nishida@wide.ad.jp" target=3D"_blank">nishida@wide.ad.jp</a>&gt;=
<br>
<b>Subject:</b> Re: [Dots] Tsvart last call review of draft-ietf-dots-signa=
l-channel-31<u></u><u></u></p>
</div>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<table class=3D"m_-7930558519819151123m_5520932283899496875gmail-m_35495954=
01067958495MsoNormalTable" border=3D"1" cellpadding=3D"0" style=3D"backgrou=
nd:rgb(243,255,51);border:1.5pt solid rgb(155,154,135)">
<tbody>
<tr>
<td style=3D"border:none;padding:0.75pt">
<p><strong><span style=3D"font-family:Arial,sans-serif;color:rgb(155,139,62=
)">CAUTION</span></strong><span style=3D"font-family:Arial,sans-serif;color=
:rgb(155,139,62)">:</span><span style=3D"font-family:Arial,sans-serif;color=
:black"> External email. Do not click links or open
 attachments unless you recognize the sender and know the content is safe.<=
/span><span style=3D"font-family:Arial,sans-serif"><u></u><u></u></span></p=
>
</td>
</tr>
</tbody>
</table>
<div class=3D"MsoNormal" align=3D"center" style=3D"text-align:center">
<hr size=3D"2" width=3D"100%" align=3D"center">
</div>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal">Hi Tiru,<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">I put my comments in lines.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<div>
<p class=3D"MsoNormal">On Mon, Apr 8, 2019 at 1:40 AM Konda, Tirumaleswar R=
eddy &lt;<a href=3D"mailto:TirumaleswarReddy_Konda@mcafee.com" target=3D"_b=
lank">TirumaleswarReddy_Konda@mcafee.com</a>&gt; wrote:<u></u><u></u></p>
</div>
<blockquote style=3D"border-top:none;border-right:none;border-bottom:none;b=
order-left:1pt solid rgb(204,204,204);padding:0in 0in 0in 6pt;margin-left:4=
.8pt;margin-right:0in">
<div>
<div>
<p class=3D"MsoNormal">Hi Yoshi,<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">Please see inline [TR2]<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<div style=3D"border-top:none;border-right:none;border-bottom:none;border-l=
eft:1.5pt solid blue;padding:0in 0in 0in 4pt">
<div>
<div style=3D"border-right:none;border-bottom:none;border-left:none;border-=
top:1pt solid rgb(225,225,225);padding:3pt 0in 0in">
<p class=3D"MsoNormal"><b>From:</b> Yoshifumi Nishida &lt;<a href=3D"mailto=
:nishida@sfc.wide.ad.jp" target=3D"_blank">nishida@sfc.wide.ad.jp</a>&gt;
<br>
<b>Sent:</b> Monday, April 8, 2019 12:24 PM<br>
<b>To:</b> Konda, Tirumaleswar Reddy &lt;<a href=3D"mailto:TirumaleswarRedd=
y_Konda@McAfee.com" target=3D"_blank">TirumaleswarReddy_Konda@McAfee.com</a=
>&gt;<br>
<b>Cc:</b> Yoshifumi Nishida &lt;<a href=3D"mailto:nishida@sfc.wide.ad.jp" =
target=3D"_blank">nishida@sfc.wide.ad.jp</a>&gt;;
<a href=3D"mailto:mohamed..boucadair@orange.com" target=3D"_blank">mohamed.=
boucadair@orange.com</a>;
<a href=3D"mailto:ietf@ietf.org" target=3D"_blank">ietf@ietf.org</a>; <a hr=
ef=3D"mailto:draft-ietf-dots-signal-channel.all@ietf.org" target=3D"_blank"=
>
draft-ietf-dots-signal-channel.all@ietf.org</a>; <a href=3D"mailto:dots@iet=
f.org" target=3D"_blank">
dots@ietf.org</a>; <a href=3D"mailto:tsv-art@ietf..org" target=3D"_blank">t=
sv-art@ietf.org</a>; Yoshifumi Nishida &lt;<a href=3D"mailto:nishida@wide.a=
d.jp" target=3D"_blank">nishida@wide.ad.jp</a>&gt;<br>
<b>Subject:</b> Re: [Dots] Tsvart last call review of draft-ietf-dots-signa=
l-channel-31<u></u><u></u></p>
</div>
</div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<div>
<table class=3D"m_-7930558519819151123m_5520932283899496875gmail-m_35495954=
01067958495MsoNormalTable" border=3D"1" cellpadding=3D"0" style=3D"backgrou=
nd:rgb(243,255,51);border:1.5pt solid rgb(155,154,135)">
<tbody>
<tr>
<td style=3D"border:none;padding:0.75pt">
<p><strong><span style=3D"font-size:10pt;font-family:Arial,sans-serif;color=
:rgb(155,139,62)">CAUTION</span></strong><span style=3D"font-size:10pt;font=
-family:Arial,sans-serif;color:rgb(155,139,62)">:</span><span style=3D"font=
-size:10pt;font-family:Arial,sans-serif;color:black">
 External email. Do not click links or open attachments unless you recogniz=
e the sender and know the content is safe.</span><u></u><u></u></p>
</td>
</tr>
</tbody>
</table>
<div class=3D"MsoNormal" align=3D"center" style=3D"text-align:center">
<hr size=3D"2" width=3D"100%" align=3D"center">
</div>
</div>
<div>
<div>
<p class=3D"MsoNormal">Hi Tiru,<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<div>
<p class=3D"MsoNormal">On Thu, Apr 4, 2019 at 10:46 PM Konda, Tirumaleswar =
Reddy &lt;<a href=3D"mailto:TirumaleswarReddy_Konda@mcafee.com" target=3D"_=
blank">TirumaleswarReddy_Konda@mcafee.com</a>&gt; wrote:<u></u><u></u></p>
</div>
<blockquote style=3D"border-top:none;border-right:none;border-bottom:none;b=
order-left:1pt solid rgb(204,204,204);padding:0in 0in 0in 6pt;margin:5pt 0i=
n 5pt 4.8pt">
<div>
<div>
<p class=3D"MsoNormal">Hmm. let&#39;s say the results of the happy eyeballs=
 was TCP over IPv4 (just like the figure 4) and the client cache the info.<=
u></u><u></u></p>
<p class=3D"MsoNormal">After certain period of time, the client will do hap=
py eyeball again because other better connections might be available . But,=
 in this case, how the cached info will be used?<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">[TR] The cache expires after a specific time period.=
 If the cache has not expired, the client uses the information from the cac=
he. If cache has expired, the client performs happy
 eyeball again.<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">It seems that an implementation that doesn&#39;t cac=
he the info at all and does happy eyeballs at every 10 hours won&#39;t be a=
llowed in this draft.<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">[TR] No, but if the subsequent attempt is within few=
 seconds after the first attempt of happy eyeball, it would trash the netwo=
rk. The endpoint may have to re-establish the (D)TLS
 session within few seconds for several reasons (e.g. TLS session got termi=
nated, DOTS server rebooted NAT rebooted etc.).<u></u><u></u></p>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Thanks for the explanation. The logic makes sense to=
 me.=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">I think it would be good to articulate this a bit mo=
re in the draft.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">For example, the figure 4 example explains the probi=
ng period, but doesn&#39;t mention about the cache period.=C2=A0<u></u><u><=
/u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal">[TR2]<u></u><u></u></p>
<p class=3D"MsoNormal">Sure, we can update the text as follows:<u></u><u></=
u></p>
<p class=3D"MsoNormal">=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal" style=3D"margin-left:4.75pt">
Note that the DOTS client after successfully establishing a connection MUST=
 cache information regarding the outcome of each<u></u><u></u></p>
<p class=3D"MsoNormal" style=3D"margin-left:4.75pt">
connection attempt and the cached information should be flushed when its ag=
e exceeds a system-defined maximum on the order of few minutes (e.g. 2 minu=
tes).
<u></u><u></u></p>
<p class=3D"MsoNormal" style=3D"margin-left:4.75pt">
If the DOTS client has to re-establish the connection with the DOTS server =
within few seconds after the Happy Eyeballs mechanism is complete,
<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0=C2=A0caching avoids trashing the network in t=
he presence of DDoS attack traffic.=C2=A0<u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Thanks for the updates. But, one thing.. The text su=
ggests cache period would be the order of few minutes.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">But, this value seems to be much smaller compared to=
 &quot;<span style=3D"color:black">probing SHOULD NOT be done more than eve=
ry 24 hours&quot;.</span><u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">[TR3] The probing is for a scenario where the client=
 is using TLS (over TCP) for the signal channel and probes to check if DTLS=
 (over UDP) becomes available. If the probing finds DTLS over UDP is availa=
ble, the client disconnects the TLS
 over TCP and re-connects to the server using DTLS over UDP transport.</p><=
/div></div></div></div></div></div></div></blockquote><div><br></div><div>T=
hanks for explanation.</div><div>OK. so, probing and cache is irrelevant. I=
 have thought about if this is confusing or not for a bit. But, I think it&=
#39;s ok after I re-read the text.</div><div>I don&#39;t have any more comm=
ents.=C2=A0</div><div>Thanks,</div><div>--</div><div>Yoshi</div><div><br></=
div><div><br></div><div><br></div><div><br></div></div></div>

--0000000000000d780f05863afcea--


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From: "Panwei (William)" <william.panwei@huawei.com>
To: Valery Smyslov <valery@smyslov.net>, "dots@ietf.org" <dots@ietf.org>
CC: "dots-chairs@ietf.org" <dots-chairs@ietf.org>, "kaduk@mit.edu" <kaduk@mit.edu>
Thread-Topic: [Dots] Adoption call for draft-reddy-dots-home-network-04
Thread-Index: AdTuHVZNyfDh6IMnTiyfhZP8vM2pOAFGr25w
Date: Mon, 15 Apr 2019 03:06:29 +0000
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Subject: Re: [Dots] Adoption call for draft-reddy-dots-home-network-04
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Hi,

I support adoption of this draft.

Best Regards
Wei Pan

-----Original Message-----
From: Dots [mailto:dots-bounces@ietf.org] On Behalf Of Valery Smyslov
Sent: Monday, April 08, 2019 11:29 PM
To: dots@ietf.org
Cc: dots-chairs@ietf.org; kaduk@mit.edu
Subject: [Dots] Adoption call for draft-reddy-dots-home-network-04

Hi all,

the chairs recently received an adoption request for draft-reddy-dots-home-=
network-04.

This message starts a two-week adoption call for draft-reddy-dots-home-netw=
ork-04.
The call ends up on Tuesday, April the 23rd.

Please send your opinion regarding adoption of this document to the list be=
fore this date.
If you think the draft should be adopted, please indicate whether you're wi=
lling to review it/to work on it. If you think the draft should not be adop=
ted, please explain why.

Regards,
Frank & Valery.


_______________________________________________
Dots mailing list
Dots@ietf.org
https://www.ietf.org/mailman/listinfo/dots


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From: "Panwei (William)" <william.panwei@huawei.com>
To: Valery Smyslov <valery@smyslov.net>, "dots@ietf.org" <dots@ietf.org>
CC: "dots-chairs@ietf.org" <dots-chairs@ietf.org>, "kaduk@mit.edu" <kaduk@mit.edu>
Thread-Topic: [Dots] Adoption call for draft-nishizuka-dots-signal-control-filtering-06
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Subject: Re: [Dots] Adoption call for draft-nishizuka-dots-signal-control-filtering-06
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Hi,

I support adoption of this draft.

Best Regards
Wei Pan


-----Original Message-----
From: Dots [mailto:dots-bounces@ietf.org] On Behalf Of Valery Smyslov
Sent: Monday, April 08, 2019 11:29 PM
To: dots@ietf.org
Cc: dots-chairs@ietf.org; kaduk@mit.edu
Subject: [Dots] Adoption call for draft-nishizuka-dots-signal-control-filte=
ring-06

Hi all,

the chairs recently received an adoption request for draft-nishizuka-dots-s=
ignal-control-filtering-06.

This message starts a two-week adoption call for draft-nishizuka-dots-signa=
l-control-filtering-06.
The call ends up on Tuesday, April the 23rd.

Please send your opinion regarding adoption of this document to the list be=
fore this date.
If you think the draft should be adopted, please indicate whether you're wi=
lling to review it/to work on it. If you think the draft should not be adop=
ted, please explain why.

Regards,
Frank & Valery.


_______________________________________________
Dots mailing list
Dots@ietf.org
https://www.ietf.org/mailman/listinfo/dots


From nobody Mon Apr 15 05:21:37 2019
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Subject: [Dots] Secdir telechat review of draft-ietf-dots-signal-channel-31
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Reviewer: Stephen Farrell
Review result: Has Issues

I took a look at the changes between -30 and -31 and at the mail
following my earlier review of -30.

To explain the "has issues" status for this review: Generally, I
think this is probably ok, but I (still) have the concerns listed
below that the ADs might wanna think about. The authors already
responded on each of these points, and made some corresponding
changes, so I guess they reckon these are non-issues. (Which is of
course fine - even if I don't quite agree, I'm often wrong:-)

- p13: The cuid still seems to me to be too static (there's a
SHOULD saying to tie it to the client certificate public key
or an equivalent).  I still think recommending a way to generate
an identifier that isn't tied to a key pair would be better, esp
if this could be used in a CPE. (Creating a new long-lived
identifier for a CPE seems like a bad plan if it's not really
needed.) For example, one could use both the SPKI and a timestamp
as input for a recommended way to generate a cuid and that should
be as unique, but without mapping 1:1 to possibly long-lived key
pairs. (-31 does say some more about how to change cuid, but still
has the same SHOULD/RECOMMENDED way to generate cuid values.)

- I wondered if a bad actor in control of an authorised DOTS
client colluding with the controller of a DDoS attack could use
this protocol to probe the network to see how their attack is
going and change the attack to be more effective.  In mail, the
authors stated that this isn't possible, and added text saying
that to -31. That may be true, but I'm not sure (given the
complexity of the protocol).

A nit:

- p91: The mention of TCP-AO seems to require suspension of
disbelief (given the lack of deployment of TCP-AO).  If we don't
think it'll be used, it'd be better to not pretend it might get
used.




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From: <mohamed.boucadair@orange.com>
To: Stephen Farrell <stephen.farrell@cs.tcd.ie>, "secdir@ietf.org" <secdir@ietf.org>
CC: "draft-ietf-dots-signal-channel.all@ietf.org" <draft-ietf-dots-signal-channel.all@ietf.org>, "ietf@ietf.org" <ietf@ietf.org>, "dots@ietf.org" <dots@ietf.org>
Thread-Topic: Secdir telechat review of draft-ietf-dots-signal-channel-31
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From nobody Mon Apr 15 06:26:09 2019
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From: Stephen Farrell <stephen.farrell@cs.tcd.ie>
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Message-ID: <6c4b8d89-c114-103e-9a6e-5a8ae6a59350@cs.tcd.ie>
Date: Mon, 15 Apr 2019 14:25:43 +0100
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Archived-At: <https://mailarchive.ietf.org/arch/msg/dots/8i5nkgF1sAFEeLl9jLn5MYRdM0Y>
Subject: Re: [Dots] Secdir telechat review of draft-ietf-dots-signal-channel-31
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From: Stephen Farrell <stephen.farrell@cs.tcd.ie>
To: mohamed.boucadair@orange.com, "secdir@ietf.org" <secdir@ietf.org>
Cc: "draft-ietf-dots-signal-channel.all@ietf.org"
 <draft-ietf-dots-signal-channel.all@ietf.org>, "ietf@ietf.org"
 <ietf@ietf.org>, "dots@ietf.org" <dots@ietf.org>
Message-ID: <6c4b8d89-c114-103e-9a6e-5a8ae6a59350@cs.tcd.ie>
Subject: Re: Secdir telechat review of draft-ietf-dots-signal-channel-31
References: <155533088202.10777.9128855796755282458@ietfa.amsl.com>
 <787AE7BB302AE849A7480A190F8B93302EA60294@OPEXCAUBMA2.corporate.adroot.infra.ftgroup>
In-Reply-To: <787AE7BB302AE849A7480A190F8B93302EA60294@OPEXCAUBMA2.corporate.adroot.infra.ftgroup>

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Hiya,

On 15/04/2019 14:16, mohamed.boucadair@orange.com wrote:
>> - p13: The cuid still seems to me to be too static (there's a
>
> [Med] This is a feature not a bug. This scheme is particularly useful
> to recover state, for example, upon reboot or crash of a DOTS client.
>=20

Well, fair enough, but FWIW I'm not convinced that a
client that can keep state (the private key and other
dots stuff) couldn't also as easily keep a cuid value.
And ISTM there should also be equally good ways to
recommend for generating a cuid that don't have that
1:1 mapping to a key pair. All that said, it's not me
needs to be convinced, but the IESG, so probably best
to wait and see if they think this is worth changing
or not before doing so.

S.



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From: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>
To: Stephen Farrell <stephen.farrell@cs.tcd.ie>, "mohamed.boucadair@orange.com" <mohamed.boucadair@orange.com>, "secdir@ietf.org" <secdir@ietf.org>
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To: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>, "mohamed.boucadair@orange.com" <mohamed.boucadair@orange.com>, "secdir@ietf.org" <secdir@ietf.org>
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From: Stephen Farrell <stephen.farrell@cs.tcd.ie>
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Subject: Re: [Dots] Secdir telechat review of draft-ietf-dots-signal-channel-31
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From: Stephen Farrell <stephen.farrell@cs.tcd.ie>
To: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>,
 "mohamed.boucadair@orange.com" <mohamed.boucadair@orange.com>,
 "secdir@ietf.org" <secdir@ietf.org>
Cc: "draft-ietf-dots-signal-channel.all@ietf.org"
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Message-ID: <a2a50713-3bd7-ffac-7287-7ce171e32359@cs.tcd.ie>
Subject: Re: [Dots] Secdir telechat review of
 draft-ietf-dots-signal-channel-31
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On 15/04/2019 15:38, Konda, Tirumaleswar Reddy wrote:
>> -----Original Message----- From: Dots <dots-bounces@ietf.org> On
>> Behalf Of Stephen Farrell Sent: Monday, April 15, 2019 6:56 PM To:
>> mohamed.boucadair@orange.com; secdir@ietf.org Cc:
>> draft-ietf-dots-signal-channel.all@ietf.org; ietf@ietf.org;
>> dots@ietf.org Subject: Re: [Dots] Secdir telechat review of
>> draft-ietf-dots-signal-channel-31
>>=20
>>=20
>> Hiya,
>>=20
>> On 15/04/2019 14:16, mohamed.boucadair@orange.com wrote:
>>>> - p13: The cuid still seems to me to be too static (there's a
>>>=20
>>> [Med] This is a feature not a bug. This scheme is particularly
>>> useful to recover state, for example, upon reboot or crash of a
>>> DOTS client.
>>>=20
>>=20
>> Well, fair enough, but FWIW I'm not convinced that a client that
>> can keep state (the private key and other dots stuff) couldn't also
>> as easily keep a cuid value. And ISTM there should also be equally
>> good ways to recommend for generating a cuid that don't have that=20
>> 1:1 mapping to a key pair. All that said, it's not me needs to be
>> convinced, but the IESG, so probably best to wait and see if they
>> think this is worth changing or not before doing so.
>=20
> The advantage of the 1:1 mapping is the DOTS servers can validate the
> DOTS client is not using the 'cuid' of another client.

So that'd be "an" advantage, if it is one;-)

But given the servers are supposed to authenticate
the client via TLS client-auth (or else the server
doesn't see the public key), I don't see the need.
Nor do I recall that the server is supposed to compare
the key to the cuid - if that check is to be done,
then that'd need to be in the spec or a client that
re-keys would have to make a new cuid. (Apologies
if that's in the spec and I've forgotten it.)

Cheers,
S.


>=20
> -Tiru
>=20
>>=20
>> S.
>>=20
>=20

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From nobody Mon Apr 15 08:19:45 2019
Return-Path: <TirumaleswarReddy_Konda@mcafee.com>
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From: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>
To: Stephen Farrell <stephen.farrell@cs.tcd.ie>, "mohamed.boucadair@orange.com" <mohamed.boucadair@orange.com>, "secdir@ietf.org" <secdir@ietf.org>
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Thread-Topic: [Dots] Secdir telechat review of draft-ietf-dots-signal-channel-31
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Archived-At: <https://mailarchive.ietf.org/arch/msg/dots/H5JG69FJruwN7pM3j92L8wwtn-s>
Subject: Re: [Dots] Secdir telechat review of draft-ietf-dots-signal-channel-31
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From: Daniel Migault <daniel.migault@ericsson.com>
Date: Mon, 15 Apr 2019 12:04:07 -0400
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Cc: Valery Smyslov <valery@smyslov.net>, "dots@ietf.org" <dots@ietf.org>,  "dots-chairs@ietf.org" <dots-chairs@ietf.org>, "kaduk@mit.edu" <kaduk@mit.edu>
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I support the adoption of the draft, please see my comments on the current
version. None of them should be considered as preventing the adoption.

Yours,
Daniel

Some random comments:


Section 1:

"""
   Some of the DDoS attacks like spoofed RST or FIN packets, Slowloris,
   and TLS re-negotiation are difficult to detect on the home network
   devices without adversely affecting its performance.  The reason is
   typically home routers have fast path to boost the throughput.  For
   every new TCP/UDP flow, only the first few packets are punted through
   the slow path.  Hence, it is not possible to detect various DDoS
   attacks in the slow path, since the attack payload is sent to the
   target server after the flow is switched to fast path.  Deep packet
   inspection (DPI) of all the packets of a flow would be able to detect
   some of the attacks.  However, a full-fledged DPI to detect these
   type of DDoS attacks is functionally or operationally not possible
   for all the devices attached to the home network owing to the memory
   and CPU limitations of the home routers.  Further, for certain DDoS
   attacks the ability to distinguish legitimate traffic from attacker
   traffic on a per packet basis is complex.  This complexity originates
   from the fact that the packet itself may look "legitimate" and no
   attack signature can be identified.  The anomaly can be identified
   only after detailed statistical analysis.
"""

I understand, the paragraph below as saying that detection at the ISP is
easier than at the homenet level as the ISP aggregates the traffic. This
is correct and I agree with the text. However, if we are going a bit
further, the detection is even easier to the DDoS target. I believe that
the same mechanism could be deployed between a DDoS target, its Cloud
provider major ISPs up to the origin. The example of the Homenet and the
ISP is only one bound but the mechanism can be generalized and actually
help coordination between independent domains.  I believe the draft can
be placed in a larger perspective.


Section 3.1 Procedure:

I am not convinced this is the right approach to switch the roles
between clients and servers. I believe that while the previous dots
signal-channel was foreseeing the relation as asymmetric, we are now
considering DOTS Client and DOTS Server as mostly symmetric. Maybe one
way to see this could be to have a DOTS communication between different
entities, and exchanges can be in both directions. The one initiating
the exchange could be designated as DOTS Initiator, while the receiving
side is the DOTS Responder.

Here is a more concrete example while Client / Server  might be
confusing. When  a server sends an alert when under attach it is designated
as the DOTS Client, while the same client specifying these IP addresses
are detected as belonging to an attacker will be the Server.

It seems also to me that establishment of the (D)TLS channel can be sent
by any other peer, not necessarily the peer sending further
notification/request. Typically the DOTS Client may have set the DOTS
channel protected by (D)TLS, and the DOTS Server may re-use that exact
same channel.

I am also wondering if the support of the extension is agreed or
announced. If so this would ease the negotiation of which peer is able
to handle the requests and be a "Server".


I believe the clarification and comparison with the
"traditional"/"initial" DOTS use cases is useful and needs to stay for
clarification purpose. However, one should make sure also that such
signalling can also be made with a signal dots signalling established in
the initial use cases. Typically, the DOTS client may have set the DOTS
channel and set a DTLS session which could carry the signalling of the
draft.


On Sun, Apr 14, 2019 at 11:06 PM Panwei (William) <william.panwei@huawei.com>
wrote:

> Hi,
>
> I support adoption of this draft.
>
> Best Regards
> Wei Pan
>
> -----Original Message-----
> From: Dots [mailto:dots-bounces@ietf.org] On Behalf Of Valery Smyslov
> Sent: Monday, April 08, 2019 11:29 PM
> To: dots@ietf.org
> Cc: dots-chairs@ietf.org; kaduk@mit.edu
> Subject: [Dots] Adoption call for draft-reddy-dots-home-network-04
>
> Hi all,
>
> the chairs recently received an adoption request for
> draft-reddy-dots-home-network-04.
>
> This message starts a two-week adoption call for
> draft-reddy-dots-home-network-04.
> The call ends up on Tuesday, April the 23rd.
>
> Please send your opinion regarding adoption of this document to the list
> before this date.
> If you think the draft should be adopted, please indicate whether you're
> willing to review it/to work on it. If you think the draft should not be
> adopted, please explain why.
>
> Regards,
> Frank & Valery.
>
>
> _______________________________________________
> Dots mailing list
> Dots@ietf.org
> https://www.ietf.org/mailman/listinfo/dots
>
> _______________________________________________
> Dots mailing list
> Dots@ietf.org
> https://www.ietf.org/mailman/listinfo/dots
>

--00000000000002fbcd058693ce74
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div dir=3D"ltr"><div dir=3D"ltr">I support the adoption o=
f the draft, please see my comments on the current version. None of them sh=
ould be considered as preventing the adoption.=C2=A0<div><br></div><div>You=
rs,=C2=A0</div><div>Daniel</div><div><br></div><div><div>Some random commen=
ts:</div><div><br></div><div><br></div><div>Section 1:</div><div><br></div>=
<div>&quot;&quot;&quot;</div><div>=C2=A0 =C2=A0Some of the DDoS attacks lik=
e spoofed RST or FIN packets, Slowloris,</div><div>=C2=A0 =C2=A0and TLS re-=
negotiation are difficult to detect on the home network</div><div>=C2=A0 =
=C2=A0devices without adversely affecting its performance.=C2=A0 The reason=
 is</div><div>=C2=A0 =C2=A0typically home routers have fast path to boost t=
he throughput.=C2=A0 For</div><div>=C2=A0 =C2=A0every new TCP/UDP flow, onl=
y the first few packets are punted through</div><div>=C2=A0 =C2=A0the slow =
path.=C2=A0 Hence, it is not possible to detect various DDoS</div><div>=C2=
=A0 =C2=A0attacks in the slow path, since the attack payload is sent to the=
</div><div>=C2=A0 =C2=A0target server after the flow is switched to fast pa=
th.=C2=A0 Deep packet</div><div>=C2=A0 =C2=A0inspection (DPI) of all the pa=
ckets of a flow would be able to detect</div><div>=C2=A0 =C2=A0some of the =
attacks.=C2=A0 However, a full-fledged DPI to detect these</div><div>=C2=A0=
 =C2=A0type of DDoS attacks is functionally or operationally not possible</=
div><div>=C2=A0 =C2=A0for all the devices attached to the home network owin=
g to the memory</div><div>=C2=A0 =C2=A0and CPU limitations of the home rout=
ers.=C2=A0 Further, for certain DDoS</div><div>=C2=A0 =C2=A0attacks the abi=
lity to distinguish legitimate traffic from attacker</div><div>=C2=A0 =C2=
=A0traffic on a per packet basis is complex.=C2=A0 This complexity originat=
es</div><div>=C2=A0 =C2=A0from the fact that the packet itself may look &qu=
ot;legitimate&quot; and no</div><div>=C2=A0 =C2=A0attack signature can be i=
dentified.=C2=A0 The anomaly can be identified</div><div>=C2=A0 =C2=A0only =
after detailed statistical analysis.</div><div>&quot;&quot;&quot;</div><div=
><br></div><div>I understand, the paragraph below as saying that detection =
at the ISP is</div><div>easier than at the homenet level as the ISP aggrega=
tes the traffic. This</div><div>is correct and I agree with the text. Howev=
er, if we are going a bit</div><div>further, the detection is even easier t=
o the DDoS target. I believe that</div><div>the same mechanism could be dep=
loyed between a DDoS target, its Cloud</div><div>provider major ISPs up to =
the origin. The example of the Homenet and the</div><div>ISP is only one bo=
und but the mechanism can be generalized and actually</div><div>help coordi=
nation between independent domains.=C2=A0 I believe the draft can</div><div=
>be placed in a larger perspective.</div><div><br></div><div><br></div><div=
>Section 3.1 Procedure:</div><div><br></div><div>I am not convinced this is=
 the right approach to switch the roles</div><div>between clients and serve=
rs. I believe that while the previous dots</div><div>signal-channel was for=
eseeing the relation as asymmetric, we are now</div><div>considering DOTS C=
lient and DOTS Server as mostly symmetric. Maybe one</div><div>way to see t=
his could be to have a DOTS communication between different</div><div>entit=
ies, and exchanges can be in both directions. The one initiating</div><div>=
the exchange could be designated as DOTS Initiator, while the receiving</di=
v><div>side is the DOTS Responder.</div><div><br></div><div>Here is a more =
concrete example while Client / Server=C2=A0 might be</div><div>confusing. =
When=C2=A0 a server sends an alert when under attach it is designated</div>=
<div>as the DOTS Client, while the same client specifying these IP addresse=
s</div><div>are detected as belonging to an attacker will be the Server.</d=
iv><div><br></div><div>It seems also to me that establishment of the (D)TLS=
 channel can be sent</div><div>by any other peer, not necessarily the peer =
sending further</div><div>notification/request. Typically the DOTS Client m=
ay have set the DOTS</div><div>channel protected by (D)TLS, and the DOTS Se=
rver may re-use that exact</div><div>same channel.</div><div><div><br></div=
><div>I am also wondering if the support of the extension is agreed or</div=
><div>announced. If so this would ease the negotiation of which peer is abl=
e</div><div>to handle the requests and be a &quot;Server&quot;.</div><div><=
br></div><div><br></div><div>I believe the clarification and comparison wit=
h the</div><div>&quot;traditional&quot;/&quot;initial&quot; DOTS use cases =
is useful and needs to stay for</div><div>clarification purpose. However, o=
ne should make sure also that such</div><div>signalling can also be made wi=
th a signal dots signalling established in</div><div>the initial use cases.=
 Typically, the DOTS client may have set the DOTS</div><div>channel and set=
 a DTLS session which could carry the signalling of the</div><div>draft.</d=
iv><div><br></div></div></div></div></div></div><br><div class=3D"gmail_quo=
te"><div dir=3D"ltr" class=3D"gmail_attr">On Sun, Apr 14, 2019 at 11:06 PM =
Panwei (William) &lt;<a href=3D"mailto:william.panwei@huawei.com">william.p=
anwei@huawei.com</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" =
style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);pa=
dding-left:1ex">Hi,<br>
<br>
I support adoption of this draft.<br>
<br>
Best Regards<br>
Wei Pan<br>
<br>
-----Original Message-----<br>
From: Dots [mailto:<a href=3D"mailto:dots-bounces@ietf.org" target=3D"_blan=
k">dots-bounces@ietf.org</a>] On Behalf Of Valery Smyslov<br>
Sent: Monday, April 08, 2019 11:29 PM<br>
To: <a href=3D"mailto:dots@ietf.org" target=3D"_blank">dots@ietf.org</a><br=
>
Cc: <a href=3D"mailto:dots-chairs@ietf.org" target=3D"_blank">dots-chairs@i=
etf.org</a>; <a href=3D"mailto:kaduk@mit.edu" target=3D"_blank">kaduk@mit.e=
du</a><br>
Subject: [Dots] Adoption call for draft-reddy-dots-home-network-04<br>
<br>
Hi all,<br>
<br>
the chairs recently received an adoption request for draft-reddy-dots-home-=
network-04.<br>
<br>
This message starts a two-week adoption call for draft-reddy-dots-home-netw=
ork-04.<br>
The call ends up on Tuesday, April the 23rd.<br>
<br>
Please send your opinion regarding adoption of this document to the list be=
fore this date.<br>
If you think the draft should be adopted, please indicate whether you&#39;r=
e willing to review it/to work on it. If you think the draft should not be =
adopted, please explain why.<br>
<br>
Regards,<br>
Frank &amp; Valery.<br>
<br>
<br>
_______________________________________________<br>
Dots mailing list<br>
<a href=3D"mailto:Dots@ietf.org" target=3D"_blank">Dots@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/dots" rel=3D"noreferrer" t=
arget=3D"_blank">https://www.ietf.org/mailman/listinfo/dots</a><br>
<br>
_______________________________________________<br>
Dots mailing list<br>
<a href=3D"mailto:Dots@ietf.org" target=3D"_blank">Dots@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/dots" rel=3D"noreferrer" t=
arget=3D"_blank">https://www.ietf.org/mailman/listinfo/dots</a><br>
</blockquote></div>

--00000000000002fbcd058693ce74--


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From: Dan Wing <danwing@gmail.com>
In-Reply-To: <023e01d4ee1f$c3892950$4a9b7bf0$@smyslov.net>
Date: Mon, 15 Apr 2019 11:04:52 -0700
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To: Valery Smyslov <valery@smyslov.net>
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Subject: Re: [Dots] Adoption call for draft-nishizuka-dots-signal-control-filtering-06
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I support adoption of this draft.

Nit: I am nervous it is unnecessarily re-stating normative behavior in =
its Section 3.2.1 -- normative behavior of acl-name and activation-type =
which should only be located in draft-ietf-dots-data-channel.  It's =
difficult to tell if the subtle word differences are intended to change =
behavior or simply restate the behavior described in =
draft-ietf-dots-data-channel.  I would just remove the text that mimics =
draft-ietf-dots-data-channel and simply point off to =
draft-ietf-dots-data-channel.

-d


> On Apr 8, 2019, at 8:28 AM, Valery Smyslov <valery@smyslov.net> wrote:
>=20
> Hi all,
>=20
> the chairs recently received an adoption request for =
draft-nishizuka-dots-signal-control-filtering-06.
>=20
> This message starts a two-week adoption call for =
draft-nishizuka-dots-signal-control-filtering-06.
> The call ends up on Tuesday, April the 23rd.
>=20
> Please send your opinion regarding adoption of this document to the =
list before this date.
> If you think the draft should be adopted, please indicate whether =
you're willing=20
> to review it/to work on it. If you think the draft should not be =
adopted, please explain why.
>=20
> Regards,
> Frank & Valery.
>=20
>=20
> _______________________________________________
> Dots mailing list
> Dots@ietf.org
> https://www.ietf.org/mailman/listinfo/dots


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From: Dan Wing <danwing@gmail.com>
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Date: Mon, 15 Apr 2019 11:04:59 -0700
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Archived-At: <https://mailarchive.ietf.org/arch/msg/dots/-kVTJkxU74jurU_o_4DdOLs5wxg>
Subject: Re: [Dots] Adoption call for draft-reddy-dots-home-network-04
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I support adoption of draft-reddy-dots-home-network.

-d


> On Apr 8, 2019, at 8:28 AM, Valery Smyslov <valery@smyslov.net> wrote:
>=20
> Hi all,
>=20
> the chairs recently received an adoption request for =
draft-reddy-dots-home-network-04.
>=20
> This message starts a two-week adoption call for =
draft-reddy-dots-home-network-04.
> The call ends up on Tuesday, April the 23rd.
>=20
> Please send your opinion regarding adoption of this document to the =
list before this date.
> If you think the draft should be adopted, please indicate whether =
you're willing=20
> to review it/to work on it. If you think the draft should not be =
adopted, please explain why.
>=20
> Regards,
> Frank & Valery.
>=20
>=20
> _______________________________________________
> Dots mailing list
> Dots@ietf.org
> https://www.ietf.org/mailman/listinfo/dots


From nobody Tue Apr 16 01:40:19 2019
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From: <mohamed.boucadair@orange.com>
To: Dan Wing <danwing@gmail.com>, Valery Smyslov <valery@smyslov.net>
CC: "dots-chairs@ietf.org" <dots-chairs@ietf.org>, "dots@ietf.org" <dots@ietf.org>, "kaduk@mit.edu" <kaduk@mit.edu>
Thread-Topic: [Dots] Adoption call for draft-nishizuka-dots-signal-control-filtering-06
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Date: Tue, 16 Apr 2019 08:40:12 +0000
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Subject: Re: [Dots] Adoption call for draft-nishizuka-dots-signal-control-filtering-06
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Hi Dan,=20

Thank you for the comment.=20

Some of the text is provided as a reminder to ease the readability of the d=
ocument, while some (new) text (e.g., "Note that both 'immediate' and 'acti=
vate-when-mitigating' have an immediate effect when a mitigation request is=
 being processed by the DOTS server.") is specific to the signal channel.=20

A first attempt to tweak the text and avoid the potential confusion you rai=
sed is available at:=20

https://github.com/boucadair/filter-control/blob/master/wdiff%20draft-nishi=
zuka-dots-signal-control-filtering-06.txt%20draft-nishizuka-dots-signal-con=
trol-filtering-06.pdf=20

Cheers,
Med

> -----Message d'origine-----
> De=A0: Dots [mailto:dots-bounces@ietf.org] De la part de Dan Wing
> Envoy=E9=A0: lundi 15 avril 2019 20:05
> =C0=A0: Valery Smyslov
> Cc=A0: dots-chairs@ietf.org; dots@ietf.org; kaduk@mit.edu
> Objet=A0: Re: [Dots] Adoption call for draft-nishizuka-dots-signal-contro=
l-
> filtering-06
>=20
> I support adoption of this draft.
>=20
> Nit: I am nervous it is unnecessarily re-stating normative behavior in it=
s
> Section 3.2.1 -- normative behavior of acl-name and activation-type which
> should only be located in draft-ietf-dots-data-channel.  It's difficult t=
o
> tell if the subtle word differences are intended to change behavior or si=
mply
> restate the behavior described in draft-ietf-dots-data-channel.  I would =
just
> remove the text that mimics draft-ietf-dots-data-channel and simply point=
 off
> to draft-ietf-dots-data-channel.
>=20
> -d
>=20
>=20
> > On Apr 8, 2019, at 8:28 AM, Valery Smyslov <valery@smyslov.net> wrote:
> >
> > Hi all,
> >
> > the chairs recently received an adoption request for draft-nishizuka-do=
ts-
> signal-control-filtering-06.
> >
> > This message starts a two-week adoption call for draft-nishizuka-dots-
> signal-control-filtering-06.
> > The call ends up on Tuesday, April the 23rd.
> >
> > Please send your opinion regarding adoption of this document to the lis=
t
> before this date.
> > If you think the draft should be adopted, please indicate whether you'r=
e
> willing
> > to review it/to work on it. If you think the draft should not be adopte=
d,
> please explain why.
> >
> > Regards,
> > Frank & Valery.
> >
> >
> > _______________________________________________
> > Dots mailing list
> > Dots@ietf.org
> > https://www.ietf.org/mailman/listinfo/dots
>=20
> _______________________________________________
> Dots mailing list
> Dots@ietf.org
> https://www.ietf.org/mailman/listinfo/dots


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From: Dan Wing <danwing@gmail.com>
In-Reply-To: <787AE7BB302AE849A7480A190F8B93302EA60D56@OPEXCAUBMA2.corporate.adroot.infra.ftgroup>
Date: Tue, 16 Apr 2019 09:08:14 -0700
Cc: Valery Smyslov <valery@smyslov.net>, "dots-chairs@ietf.org" <dots-chairs@ietf.org>, "dots@ietf.org" <dots@ietf.org>, "kaduk@mit.edu" <kaduk@mit.edu>
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To: Mohamed Boucadair <mohamed.boucadair@orange.com>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/dots/ZxYlyR7oRXBjzN5qbtUOyZWFDXQ>
Subject: Re: [Dots] Adoption call for draft-nishizuka-dots-signal-control-filtering-06
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Thanks.
-d


> On Apr 16, 2019, at 1:40 AM, <mohamed.boucadair@orange.com> =
<mohamed.boucadair@orange.com> wrote:
>=20
> Hi Dan,=20
>=20
> Thank you for the comment.=20
>=20
> Some of the text is provided as a reminder to ease the readability of =
the document, while some (new) text (e.g., "Note that both 'immediate' =
and 'activate-when-mitigating' have an immediate effect when a =
mitigation request is being processed by the DOTS server.") is specific =
to the signal channel.=20
>=20
> A first attempt to tweak the text and avoid the potential confusion =
you raised is available at:=20
>=20
> =
https://github.com/boucadair/filter-control/blob/master/wdiff%20draft-nish=
izuka-dots-signal-control-filtering-06.txt%20draft-nishizuka-dots-signal-c=
ontrol-filtering-06.pdf=20
>=20
> Cheers,
> Med
>=20
>> -----Message d'origine-----
>> De : Dots [mailto:dots-bounces@ietf.org] De la part de Dan Wing
>> Envoy=C3=A9 : lundi 15 avril 2019 20:05
>> =C3=80 : Valery Smyslov
>> Cc : dots-chairs@ietf.org; dots@ietf.org; kaduk@mit.edu
>> Objet : Re: [Dots] Adoption call for =
draft-nishizuka-dots-signal-control-
>> filtering-06
>>=20
>> I support adoption of this draft.
>>=20
>> Nit: I am nervous it is unnecessarily re-stating normative behavior =
in its
>> Section 3.2.1 -- normative behavior of acl-name and activation-type =
which
>> should only be located in draft-ietf-dots-data-channel.  It's =
difficult to
>> tell if the subtle word differences are intended to change behavior =
or simply
>> restate the behavior described in draft-ietf-dots-data-channel.  I =
would just
>> remove the text that mimics draft-ietf-dots-data-channel and simply =
point off
>> to draft-ietf-dots-data-channel.
>>=20
>> -d
>>=20
>>=20
>>> On Apr 8, 2019, at 8:28 AM, Valery Smyslov <valery@smyslov.net> =
wrote:
>>>=20
>>> Hi all,
>>>=20
>>> the chairs recently received an adoption request for =
draft-nishizuka-dots-
>> signal-control-filtering-06.
>>>=20
>>> This message starts a two-week adoption call for =
draft-nishizuka-dots-
>> signal-control-filtering-06.
>>> The call ends up on Tuesday, April the 23rd.
>>>=20
>>> Please send your opinion regarding adoption of this document to the =
list
>> before this date.
>>> If you think the draft should be adopted, please indicate whether =
you're
>> willing
>>> to review it/to work on it. If you think the draft should not be =
adopted,
>> please explain why.
>>>=20
>>> Regards,
>>> Frank & Valery.
>>>=20
>>>=20
>>> _______________________________________________
>>> Dots mailing list
>>> Dots@ietf.org
>>> https://www.ietf.org/mailman/listinfo/dots
>>=20
>> _______________________________________________
>> Dots mailing list
>> Dots@ietf.org
>> https://www.ietf.org/mailman/listinfo/dots


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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the DDoS Open Threat Signaling WG of the IETF.

        Title           : Distributed-Denial-of-Service Open Threat Signaling (DOTS) Server Discovery
        Authors         : Mohamed Boucadair
                          Tirumaleswar Reddy
                          Prashanth Patil
	Filename        : draft-ietf-dots-server-discovery-01.txt
	Pages           : 20
	Date            : 2019-04-17

Abstract:
   It may not be possible for a network to determine the cause for an
   attack, but instead just realize that some resources seem to be under
   attack.  To fill that gap, Distributed-Denial-of-Service Open Threat
   Signaling (DOTS) allows a network to inform a DOTS server that it is
   under a potential attack so that appropriate mitigation actions are
   undertaken.

   This document specifies mechanisms to configure DOTS clients with
   DOTS servers.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-dots-server-discovery/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-dots-server-discovery-01
https://datatracker.ietf.org/doc/html/draft-ietf-dots-server-discovery-01

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-dots-server-discovery-01


Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/


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Date: Wed, 17 Apr 2019 17:22:15 +0800
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<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charse=
t=3Dutf-8"><style>body { line-height: 1.5; }blockquote { margin-top: 0px; =
margin-bottom: 0px; margin-left: 0.5em; }p { margin-top: 0px; margin-botto=
m: 0px; }body { font-size: 10.5pt; font-family: =E5=BE=AE=E8=BD=AF=E9=9B=
=85=E9=BB=91; color: rgb(0, 0, 0); line-height: 1.5; }</style></head><body=
>=0A<div><span></span>Hi,</div><div>I have a question, does the call home =
in&nbsp;<span style=3D"line-height: 18px;">draft-reddy-dots-home-network-0=
4&nbsp;</span><span style=3D"widows: auto; line-height: 1.5;">consistent w=
ith the "call home" in RFC8071?</span></div>=0A<div>&nbsp;</div><div><br><=
/div><p data-section=3D"1" class=3D"tgt" style=3D"box-sizing: border-box; =
margin-right: 0px; margin-left: 0px; padding: 0px; min-height: 26px; line-=
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', '\\5FAE=E8=BD=AF=E9=9B=85=E9=BB=91', '\\5B8B=E4=BD=93', 'Malgun Gothic'=
, Meiryo, sans-serif; text-align: justify; widows: auto; background-color:=
 rgb(247, 248, 250);">best regards.</p><p data-section=3D"3" class=3D"tgt"=
 style=3D"box-sizing: border-box; margin-right: 0px; margin-left: 0px; pad=
ding: 0px; min-height: 26px; line-height: 26px; color: rgb(51, 51, 51); fo=
nt-family: Arial, 'Microsoft YaHei', '\\5FAE=E8=BD=AF=E9=9B=85=E9=BB=91', =
'\\5B8B=E4=BD=93', 'Malgun Gothic', Meiryo, sans-serif; text-align: justif=
y; widows: auto; background-color: rgb(247, 248, 250);"><span data-section=
=3D"3" data-sentence=3D"0" data-group=3D"3-0" class=3D"tgt" style=3D"box-s=
izing: border-box; min-height: 26px;">------------------------------------=
--------------------------------------------------</span></p><p data-secti=
on=3D"4" class=3D"tgt" style=3D"box-sizing: border-box; margin-right: 0px;=
 margin-left: 0px; padding: 0px; min-height: 26px; line-height: 26px; colo=
r: rgb(51, 51, 51); font-family: Arial, 'Microsoft YaHei', '\\5FAE=E8=BD=
=AF=E9=9B=85=E9=BB=91', '\\5B8B=E4=BD=93', 'Malgun Gothic', Meiryo, sans-s=
erif; text-align: justify; widows: auto; background-color: rgb(247, 248, 2=
50);"><span data-section=3D"4" data-sentence=3D"0" data-group=3D"4-0" clas=
s=3D"tgt" style=3D"box-sizing: border-box; min-height: 26px;">Research ins=
titute of China mobile communications co. LTD</span></p><p data-section=3D=
"5" class=3D"tgt" style=3D"box-sizing: border-box; margin-right: 0px; marg=
in-left: 0px; padding: 0px; min-height: 26px; line-height: 26px; color: rg=
b(51, 51, 51); font-family: Arial, 'Microsoft YaHei', '\\5FAE=E8=BD=AF=E9=
=9B=85=E9=BB=91', '\\5B8B=E4=BD=93', 'Malgun Gothic', Meiryo, sans-serif; =
text-align: justify; widows: auto; background-color: rgb(247, 248, 250);">=
<span data-section=3D"5" data-sentence=3D"0" data-group=3D"5-0" class=3D"t=
gt" style=3D"box-sizing: border-box; min-height: 26px;">Institute of safet=
y technology</span></p><p data-section=3D"6" class=3D"tgt" style=3D"box-si=
zing: border-box; margin-right: 0px; margin-left: 0px; padding: 0px; min-h=
eight: 26px; line-height: 26px; color: rgb(51, 51, 51); font-family: Arial=
, 'Microsoft YaHei', '\\5FAE=E8=BD=AF=E9=9B=85=E9=BB=91', '\\5B8B=E4=BD=93=
', 'Malgun Gothic', Meiryo, sans-serif; text-align: justify; widows: auto;=
 background-color: rgb(247, 248, 250);"><span data-section=3D"6" data-sent=
ence=3D"0" data-group=3D"6-0" class=3D"tgt" style=3D"box-sizing: border-bo=
x; min-height: 26px;">Email address: chenmeiling@chinamobile.com</span></p=
><p data-section=3D"7" class=3D"tgt" style=3D"box-sizing: border-box; marg=
in-right: 0px; margin-left: 0px; padding: 0px; min-height: 26px; line-heig=
ht: 26px; color: rgb(51, 51, 51); font-family: Arial, 'Microsoft YaHei', '=
\\5FAE=E8=BD=AF=E9=9B=85=E9=BB=91', '\\5B8B=E4=BD=93', 'Malgun Gothic', Me=
iryo, sans-serif; text-align: justify; widows: auto; background-color: rgb=
(247, 248, 250);"><span data-section=3D"7" data-sentence=3D"0" data-group=
=3D"7-0" class=3D"tgt" style=3D"box-sizing: border-box; min-height: 26px;"=
>Phone: 13810149515</span></p><p data-section=3D"8" class=3D"tgt" style=3D=
"box-sizing: border-box; margin-right: 0px; margin-left: 0px; padding: 0px=
; min-height: 26px; line-height: 26px; color: rgb(51, 51, 51); font-family=
: Arial, 'Microsoft YaHei', '\\5FAE=E8=BD=AF=E9=9B=85=E9=BB=91', '\\5B8B=
=E4=BD=93', 'Malgun Gothic', Meiryo, sans-serif; text-align: justify; wido=
ws: auto; background-color: rgb(247, 248, 250);"><span data-section=3D"8" =
data-sentence=3D"0" data-group=3D"8-0" class=3D"tgt" style=3D"box-sizing: =
border-box; min-height: 26px;">Telephone: 15801696688-34283</span></p><p d=
ata-section=3D"9" class=3D"tgt" style=3D"box-sizing: border-box; margin-ri=
ght: 0px; margin-left: 0px; padding: 0px; min-height: 26px; line-height: 2=
6px; color: rgb(51, 51, 51); font-family: Arial, 'Microsoft YaHei', '\\5FA=
E=E8=BD=AF=E9=9B=85=E9=BB=91', '\\5B8B=E4=BD=93', 'Malgun Gothic', Meiryo,=
 sans-serif; text-align: justify; widows: auto; background-color: rgb(247,=
 248, 250);"><span data-section=3D"9" data-sentence=3D"0" data-group=3D"9-=
0" class=3D"tgt" style=3D"box-sizing: border-box; min-height: 26px;">Addre=
ss: no. 32, xuanwumen west street, xicheng district, Beijing (mobile innov=
ation building)</span></p><div><span><div style=3D"MARGIN: 10px; FONT-FAMI=
LY: verdana; FONT-SIZE: 10pt">=0A<!--EndFragment--></div></span></div>=0A<=
blockquote style=3D"margin-Top: 0px; margin-Bottom: 0px; margin-Left: 0.5e=
m"><div>&nbsp;</div><div style=3D"border:none;border-top:solid #B5C4DF 1.0=
pt;padding:3.0pt 0cm 0cm 0cm"><div style=3D"PADDING-RIGHT: 8px; PADDING-LE=
FT: 8px; FONT-SIZE: 12px;FONT-FAMILY:tahoma;COLOR:#000000; BACKGROUND: #ef=
efef; PADDING-BOTTOM: 8px; PADDING-TOP: 8px"><div><b>From:</b>&nbsp;<a hre=
f=3D"mailto:valery@smyslov.net">Valery Smyslov</a></div><div><b>Date:</b>&=
nbsp;2019-04-08&nbsp;23:28</div><div><b>To:</b>&nbsp;<a href=3D"mailto:dot=
s@ietf.org">dots@ietf.org</a></div><div><b>CC:</b>&nbsp;<a href=3D"mailto:=
dots-chairs@ietf.org">dots-chairs</a>; <a href=3D"mailto:kaduk@mit.edu">ka=
duk</a></div><div><b>Subject:</b>&nbsp;[Dots] Adoption call for draft-redd=
y-dots-home-network-04</div></div></div><div><div>Hi all,</div>=0A<div>&nb=
sp;</div>=0A<div>the chairs recently received an adoption request for draf=
t-reddy-dots-home-network-04.</div>=0A<div>&nbsp;</div>=0A<div>This messag=
e starts a two-week adoption call for draft-reddy-dots-home-network-04.</d=
iv>=0A<div>The call ends up on Tuesday, April the 23rd.</div>=0A<div>&nbsp=
;</div>=0A<div>Please send your opinion regarding adoption of this documen=
t to the list before this date.</div>=0A<div>If you think the draft should=
 be adopted, please indicate whether you're willing </div>=0A<div>to revie=
w it/to work on it. If you think the draft should not be adopted, please e=
xplain why.</div>=0A<div>&nbsp;</div>=0A<div>Regards,</div>=0A<div>Frank &=
amp; Valery.</div>=0A<div>&nbsp;</div>=0A<div>&nbsp;</div>=0A<div>________=
_______________________________________</div>=0A<div>Dots mailing list</di=
v>=0A<div>Dots@ietf.org</div>=0A<div>https://www.ietf.org/mailman/listinfo=
/dots</div>=0A<div>&nbsp;</div>=0A</div></blockquote>=0A</body></html>
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From: <mohamed.boucadair@orange.com>
To: "dots@ietf.org" <dots@ietf.org>
Thread-Topic: [Dots] I-D Action: draft-ietf-dots-server-discovery-01.txt
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Subject: Re: [Dots] I-D Action: draft-ietf-dots-server-discovery-01.txt
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Hi all,

This new version implements the changes that were presented in Prague (http=
s://datatracker.ietf.org/meeting/104/materials/slides-104-dots-dots-server-=
discovery-ietf104-00):=20

* Shorten the list of discovery options: Remove anycast and mDNS.
* Call out triggers to execute the discovery procedure.
* Add a pointer to ZSTP as suggested by Kent. =20

As a next step, a request will be sent to the dhc WG to review the DHCP par=
t of the specification.=20

Comments are more than welcome.=20

Cheers,
Med

> -----Message d'origine-----
> De=A0: Dots [mailto:dots-bounces@ietf.org] De la part de internet-
> drafts@ietf.org
> Envoy=E9=A0: mercredi 17 avril 2019 11:13
> =C0=A0: i-d-announce@ietf.org
> Cc=A0: dots@ietf.org
> Objet=A0: [Dots] I-D Action: draft-ietf-dots-server-discovery-01.txt
>=20
>=20
> A New Internet-Draft is available from the on-line Internet-Drafts
> directories.
> This draft is a work item of the DDoS Open Threat Signaling WG of the IET=
F.
>=20
>         Title           : Distributed-Denial-of-Service Open Threat Signa=
ling
> (DOTS) Server Discovery
>         Authors         : Mohamed Boucadair
>                           Tirumaleswar Reddy
>                           Prashanth Patil
> 	Filename        : draft-ietf-dots-server-discovery-01.txt
> 	Pages           : 20
> 	Date            : 2019-04-17
>=20
> Abstract:
>    It may not be possible for a network to determine the cause for an
>    attack, but instead just realize that some resources seem to be under
>    attack.  To fill that gap, Distributed-Denial-of-Service Open Threat
>    Signaling (DOTS) allows a network to inform a DOTS server that it is
>    under a potential attack so that appropriate mitigation actions are
>    undertaken.
>=20
>    This document specifies mechanisms to configure DOTS clients with
>    DOTS servers.
>=20
>=20
> The IETF datatracker status page for this draft is:
> https://datatracker.ietf.org/doc/draft-ietf-dots-server-discovery/
>=20
> There are also htmlized versions available at:
> https://tools.ietf.org/html/draft-ietf-dots-server-discovery-01
> https://datatracker.ietf.org/doc/html/draft-ietf-dots-server-discovery-01
>=20
> A diff from the previous version is available at:
> https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-dots-server-discovery-01
>=20
>=20
> Please note that it may take a couple of minutes from the time of submiss=
ion
> until the htmlized version and diff are available at tools.ietf.org.
>=20
> Internet-Drafts are also available by anonymous FTP at:
> ftp://ftp.ietf.org/internet-drafts/
>=20
> _______________________________________________
> Dots mailing list
> Dots@ietf.org
> https://www.ietf.org/mailman/listinfo/dots


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From: <mohamed.boucadair@orange.com>
To: MeiLing Chen <chenmeiling@chinamobile.com>, Valery Smyslov <valery@smyslov.net>, dots <dots@ietf.org>
CC: dots-chairs <dots-chairs@ietf.org>, kaduk <kaduk@mit.edu>
Thread-Topic: [Dots] Adoption call for draft-reddy-dots-home-network-04
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Date: Wed, 17 Apr 2019 09:44:16 +0000
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From nobody Wed Apr 17 17:48:55 2019
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Subject: Re: [Dots] Adoption call for draft-reddy-dots-home-network-04
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I support adoption of this draft.
And +1 to this Daniel's comment.

 > the mechanism can be generalized and actually
 > help coordination between independent domains.  I believe the draft can
 > be placed in a larger perspective.

thanks,
Kaname Nishizuka

On 2019/04/16 1:04, Daniel Migault wrote:
> I support the adoption of the draft, please see my comments on the current version. None of them should be considered as preventing the adoption.
>
> Yours,
> Daniel
>
> Some random comments:
>
>
> Section 1:
>
> """
>    Some of the DDoS attacks like spoofed RST or FIN packets, Slowloris,
>    and TLS re-negotiation are difficult to detect on the home network
>    devices without adversely affecting its performance.  The reason is
>    typically home routers have fast path to boost the throughput.  For
>    every new TCP/UDP flow, only the first few packets are punted through
>    the slow path.  Hence, it is not possible to detect various DDoS
>    attacks in the slow path, since the attack payload is sent to the
>    target server after the flow is switched to fast path.  Deep packet
>    inspection (DPI) of all the packets of a flow would be able to detect
>    some of the attacks.  However, a full-fledged DPI to detect these
>    type of DDoS attacks is functionally or operationally not possible
>    for all the devices attached to the home network owing to the memory
>    and CPU limitations of the home routers.  Further, for certain DDoS
>    attacks the ability to distinguish legitimate traffic from attacker
>    traffic on a per packet basis is complex.  This complexity originates
>    from the fact that the packet itself may look "legitimate" and no
>    attack signature can be identified.  The anomaly can be identified
>    only after detailed statistical analysis.
> """
>
> I understand, the paragraph below as saying that detection at the ISP is
> easier than at the homenet level as the ISP aggregates the traffic. This
> is correct and I agree with the text. However, if we are going a bit
> further, the detection is even easier to the DDoS target. I believe that
> the same mechanism could be deployed between a DDoS target, its Cloud
> provider major ISPs up to the origin. The example of the Homenet and the
> ISP is only one bound but the mechanism can be generalized and actually
> help coordination between independent domains.  I believe the draft can
> be placed in a larger perspective.
>
>
> Section 3.1 Procedure:
>
> I am not convinced this is the right approach to switch the roles
> between clients and servers. I believe that while the previous dots
> signal-channel was foreseeing the relation as asymmetric, we are now
> considering DOTS Client and DOTS Server as mostly symmetric. Maybe one
> way to see this could be to have a DOTS communication between different
> entities, and exchanges can be in both directions. The one initiating
> the exchange could be designated as DOTS Initiator, while the receiving
> side is the DOTS Responder.
>
> Here is a more concrete example while Client / Server  might be
> confusing. When  a server sends an alert when under attach it is designated
> as the DOTS Client, while the same client specifying these IP addresses
> are detected as belonging to an attacker will be the Server.
>
> It seems also to me that establishment of the (D)TLS channel can be sent
> by any other peer, not necessarily the peer sending further
> notification/request. Typically the DOTS Client may have set the DOTS
> channel protected by (D)TLS, and the DOTS Server may re-use that exact
> same channel.
>
> I am also wondering if the support of the extension is agreed or
> announced. If so this would ease the negotiation of which peer is able
> to handle the requests and be a "Server".
>
>
> I believe the clarification and comparison with the
> "traditional"/"initial" DOTS use cases is useful and needs to stay for
> clarification purpose. However, one should make sure also that such
> signalling can also be made with a signal dots signalling established in
> the initial use cases. Typically, the DOTS client may have set the DOTS
> channel and set a DTLS session which could carry the signalling of the
> draft.
>
>
> On Sun, Apr 14, 2019 at 11:06 PM Panwei (William) <william.panwei@huawei.com <mailto:william.panwei@huawei.com>> wrote:
>
>     Hi,
>
>     I support adoption of this draft.
>
>     Best Regards
>     Wei Pan
>
>     -----Original Message-----
>     From: Dots [mailto:dots-bounces@ietf.org <mailto:dots-bounces@ietf.org>] On Behalf Of Valery Smyslov
>     Sent: Monday, April 08, 2019 11:29 PM
>     To: dots@ietf.org <mailto:dots@ietf.org>
>     Cc: dots-chairs@ietf.org <mailto:dots-chairs@ietf.org>; kaduk@mit.edu <mailto:kaduk@mit.edu>
>     Subject: [Dots] Adoption call for draft-reddy-dots-home-network-04
>
>     Hi all,
>
>     the chairs recently received an adoption request for draft-reddy-dots-home-network-04.
>
>     This message starts a two-week adoption call for draft-reddy-dots-home-network-04.
>     The call ends up on Tuesday, April the 23rd.
>
>     Please send your opinion regarding adoption of this document to the list before this date.
>     If you think the draft should be adopted, please indicate whether you're willing to review it/to work on it. If you think the draft should not be adopted, please explain why.
>
>     Regards,
>     Frank & Valery.
>
>
>     _______________________________________________
>     Dots mailing list
>     Dots@ietf.org <mailto:Dots@ietf.org>
>     https://www.ietf.org/mailman/listinfo/dots
>
>     _______________________________________________
>     Dots mailing list
>     Dots@ietf.org <mailto:Dots@ietf.org>
>     https://www.ietf.org/mailman/listinfo/dots
>
>
> _______________________________________________
> Dots mailing list
> Dots@ietf.org
> https://www.ietf.org/mailman/listinfo/dots


--------------8ADB9A9317699F12309A52FD
Content-Type: text/html; charset=utf-8
Content-Transfer-Encoding: 8bit

<html>
  <head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
  </head>
  <body text="#000000" bgcolor="#FFFFFF">
    I support adoption of this draft.<br>
    And +1 to this Daniel's comment.<br>
    <br>
    &gt; the mechanism can be generalized and actually<br>
    &gt; help coordination between independent domains.  I believe the
    draft can<br>
    &gt; be placed in a larger perspective.<br>
    <br>
    thanks,<br>
    Kaname Nishizuka<br>
    <br>
    <div class="moz-cite-prefix">On 2019/04/16 1:04, Daniel Migault
      wrote:<br>
    </div>
    <blockquote type="cite"
cite="mid:CADZyTkmtyO25-JiHMicZDUL2F+5RXpnFPsYHmyn67yfHTns5fA@mail.gmail.com">
      <meta http-equiv="content-type" content="text/html; charset=UTF-8">
      <div dir="ltr">
        <div dir="ltr">
          <div dir="ltr">I support the adoption of the draft, please see
            my comments on the current version. None of them should be
            considered as preventing the adoption. 
            <div><br>
            </div>
            <div>Yours, </div>
            <div>Daniel</div>
            <div><br>
            </div>
            <div>
              <div>Some random comments:</div>
              <div><br>
              </div>
              <div><br>
              </div>
              <div>Section 1:</div>
              <div><br>
              </div>
              <div>"""</div>
              <div>   Some of the DDoS attacks like spoofed RST or FIN
                packets, Slowloris,</div>
              <div>   and TLS re-negotiation are difficult to detect on
                the home network</div>
              <div>   devices without adversely affecting its
                performance.  The reason is</div>
              <div>   typically home routers have fast path to boost the
                throughput.  For</div>
              <div>   every new TCP/UDP flow, only the first few packets
                are punted through</div>
              <div>   the slow path.  Hence, it is not possible to
                detect various DDoS</div>
              <div>   attacks in the slow path, since the attack payload
                is sent to the</div>
              <div>   target server after the flow is switched to fast
                path.  Deep packet</div>
              <div>   inspection (DPI) of all the packets of a flow
                would be able to detect</div>
              <div>   some of the attacks.  However, a full-fledged DPI
                to detect these</div>
              <div>   type of DDoS attacks is functionally or
                operationally not possible</div>
              <div>   for all the devices attached to the home network
                owing to the memory</div>
              <div>   and CPU limitations of the home routers.  Further,
                for certain DDoS</div>
              <div>   attacks the ability to distinguish legitimate
                traffic from attacker</div>
              <div>   traffic on a per packet basis is complex.  This
                complexity originates</div>
              <div>   from the fact that the packet itself may look
                "legitimate" and no</div>
              <div>   attack signature can be identified.  The anomaly
                can be identified</div>
              <div>   only after detailed statistical analysis.</div>
              <div>"""</div>
              <div><br>
              </div>
              <div>I understand, the paragraph below as saying that
                detection at the ISP is</div>
              <div>easier than at the homenet level as the ISP
                aggregates the traffic. This</div>
              <div>is correct and I agree with the text. However, if we
                are going a bit</div>
              <div>further, the detection is even easier to the DDoS
                target. I believe that</div>
              <div>the same mechanism could be deployed between a DDoS
                target, its Cloud</div>
              <div>provider major ISPs up to the origin. The example of
                the Homenet and the</div>
              <div>ISP is only one bound but the mechanism can be
                generalized and actually</div>
              <div>help coordination between independent domains.  I
                believe the draft can</div>
              <div>be placed in a larger perspective.</div>
              <div><br>
              </div>
              <div><br>
              </div>
              <div>Section 3.1 Procedure:</div>
              <div><br>
              </div>
              <div>I am not convinced this is the right approach to
                switch the roles</div>
              <div>between clients and servers. I believe that while the
                previous dots</div>
              <div>signal-channel was foreseeing the relation as
                asymmetric, we are now</div>
              <div>considering DOTS Client and DOTS Server as mostly
                symmetric. Maybe one</div>
              <div>way to see this could be to have a DOTS communication
                between different</div>
              <div>entities, and exchanges can be in both directions.
                The one initiating</div>
              <div>the exchange could be designated as DOTS Initiator,
                while the receiving</div>
              <div>side is the DOTS Responder.</div>
              <div><br>
              </div>
              <div>Here is a more concrete example while Client /
                Server  might be</div>
              <div>confusing. When  a server sends an alert when under
                attach it is designated</div>
              <div>as the DOTS Client, while the same client specifying
                these IP addresses</div>
              <div>are detected as belonging to an attacker will be the
                Server.</div>
              <div><br>
              </div>
              <div>It seems also to me that establishment of the (D)TLS
                channel can be sent</div>
              <div>by any other peer, not necessarily the peer sending
                further</div>
              <div>notification/request. Typically the DOTS Client may
                have set the DOTS</div>
              <div>channel protected by (D)TLS, and the DOTS Server may
                re-use that exact</div>
              <div>same channel.</div>
              <div>
                <div><br>
                </div>
                <div>I am also wondering if the support of the extension
                  is agreed or</div>
                <div>announced. If so this would ease the negotiation of
                  which peer is able</div>
                <div>to handle the requests and be a "Server".</div>
                <div><br>
                </div>
                <div><br>
                </div>
                <div>I believe the clarification and comparison with the</div>
                <div>"traditional"/"initial" DOTS use cases is useful
                  and needs to stay for</div>
                <div>clarification purpose. However, one should make
                  sure also that such</div>
                <div>signalling can also be made with a signal dots
                  signalling established in</div>
                <div>the initial use cases. Typically, the DOTS client
                  may have set the DOTS</div>
                <div>channel and set a DTLS session which could carry
                  the signalling of the</div>
                <div>draft.</div>
                <div><br>
                </div>
              </div>
            </div>
          </div>
        </div>
      </div>
      <br>
      <div class="gmail_quote">
        <div dir="ltr" class="gmail_attr">On Sun, Apr 14, 2019 at 11:06
          PM Panwei (William) &lt;<a
            href="mailto:william.panwei@huawei.com"
            moz-do-not-send="true">william.panwei@huawei.com</a>&gt;
          wrote:<br>
        </div>
        <blockquote class="gmail_quote" style="margin:0px 0px 0px
          0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Hi,<br>
          <br>
          I support adoption of this draft.<br>
          <br>
          Best Regards<br>
          Wei Pan<br>
          <br>
          -----Original Message-----<br>
          From: Dots [mailto:<a href="mailto:dots-bounces@ietf.org"
            target="_blank" moz-do-not-send="true">dots-bounces@ietf.org</a>]
          On Behalf Of Valery Smyslov<br>
          Sent: Monday, April 08, 2019 11:29 PM<br>
          To: <a href="mailto:dots@ietf.org" target="_blank"
            moz-do-not-send="true">dots@ietf.org</a><br>
          Cc: <a href="mailto:dots-chairs@ietf.org" target="_blank"
            moz-do-not-send="true">dots-chairs@ietf.org</a>; <a
            href="mailto:kaduk@mit.edu" target="_blank"
            moz-do-not-send="true">kaduk@mit.edu</a><br>
          Subject: [Dots] Adoption call for
          draft-reddy-dots-home-network-04<br>
          <br>
          Hi all,<br>
          <br>
          the chairs recently received an adoption request for
          draft-reddy-dots-home-network-04.<br>
          <br>
          This message starts a two-week adoption call for
          draft-reddy-dots-home-network-04.<br>
          The call ends up on Tuesday, April the 23rd.<br>
          <br>
          Please send your opinion regarding adoption of this document
          to the list before this date.<br>
          If you think the draft should be adopted, please indicate
          whether you're willing to review it/to work on it. If you
          think the draft should not be adopted, please explain why.<br>
          <br>
          Regards,<br>
          Frank &amp; Valery.<br>
          <br>
          <br>
          _______________________________________________<br>
          Dots mailing list<br>
          <a href="mailto:Dots@ietf.org" target="_blank"
            moz-do-not-send="true">Dots@ietf.org</a><br>
          <a href="https://www.ietf.org/mailman/listinfo/dots"
            rel="noreferrer" target="_blank" moz-do-not-send="true">https://www.ietf.org/mailman/listinfo/dots</a><br>
          <br>
          _______________________________________________<br>
          Dots mailing list<br>
          <a href="mailto:Dots@ietf.org" target="_blank"
            moz-do-not-send="true">Dots@ietf.org</a><br>
          <a href="https://www.ietf.org/mailman/listinfo/dots"
            rel="noreferrer" target="_blank" moz-do-not-send="true">https://www.ietf.org/mailman/listinfo/dots</a><br>
        </blockquote>
      </div>
      <br>
      <fieldset class="mimeAttachmentHeader"></fieldset>
      <pre class="moz-quote-pre" wrap="">_______________________________________________
Dots mailing list
<a class="moz-txt-link-abbreviated" href="mailto:Dots@ietf.org">Dots@ietf.org</a>
<a class="moz-txt-link-freetext" href="https://www.ietf.org/mailman/listinfo/dots">https://www.ietf.org/mailman/listinfo/dots</a>
</pre>
    </blockquote>
    <br>
  </body>
</html>

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Subject: Re: [Dots] Adoption call for draft-nishizuka-dots-signal-control-filtering-06
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Hi all,

I support adoption of this draft.

Thanks,
Yuhei

> -----Original Message-----
> From: Dots [mailto:dots-bounces@ietf.org] On Behalf Of Valery Smyslov
> Sent: Tuesday, April 09, 2019 12:29 AM
> To: dots@ietf.org
> Cc: dots-chairs@ietf.org; kaduk@mit.edu
> Subject: [Dots] Adoption call for draft-nishizuka-dots-signal-control-filtering-06
> 
> Hi all,
> 
> the chairs recently received an adoption request for draft-nishizuka-dots-signal-control-filtering-06.
> 
> This message starts a two-week adoption call for draft-nishizuka-dots-signal-control-filtering-06.
> The call ends up on Tuesday, April the 23rd.
> 
> Please send your opinion regarding adoption of this document to the list before this date.
> If you think the draft should be adopted, please indicate whether you're willing
> to review it/to work on it. If you think the draft should not be adopted, please explain why.
> 
> Regards,
> Frank & Valery.
> 
> 
> _______________________________________________
> Dots mailing list
> Dots@ietf.org
> https://www.ietf.org/mailman/listinfo/dots


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From: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>
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Thread-Topic: [Dots] Adoption call for draft-reddy-dots-home-network-04
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Subject: Re: [Dots] Adoption call for draft-reddy-dots-home-network-04
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From: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>
To: Valery Smyslov <valery@smyslov.net>, "dots@ietf.org" <dots@ietf.org>
CC: "dots-chairs@ietf.org" <dots-chairs@ietf.org>, "kaduk@mit.edu" <kaduk@mit.edu>
Thread-Topic: [Dots] Adoption call for draft-nishizuka-dots-signal-control-filtering-06
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Archived-At: <https://mailarchive.ietf.org/arch/msg/dots/uTy76G3gq5TO3U0kdcPnLMeaMeg>
Subject: Re: [Dots] Adoption call for draft-nishizuka-dots-signal-control-filtering-06
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I support the adoption of this draft (especially with the continuous increa=
se in internal attacks).

Cheers,
-Tiru

> -----Original Message-----
> From: Dots <dots-bounces@ietf.org> On Behalf Of Valery Smyslov
> Sent: Monday, April 8, 2019 8:59 PM
> To: dots@ietf.org
> Cc: dots-chairs@ietf.org; kaduk@mit.edu
> Subject: [Dots] Adoption call for draft-nishizuka-dots-signal-control-fil=
tering-
> 06
>=20
>=20
>=20
> Hi all,
>=20
> the chairs recently received an adoption request for draft-nishizuka-dots=
-
> signal-control-filtering-06.
>=20
> This message starts a two-week adoption call for draft-nishizuka-dots-sig=
nal-
> control-filtering-06.
> The call ends up on Tuesday, April the 23rd.
>=20
> Please send your opinion regarding adoption of this document to the list
> before this date.
> If you think the draft should be adopted, please indicate whether you're
> willing to review it/to work on it. If you think the draft should not be =
adopted,
> please explain why.
>=20
> Regards,
> Frank & Valery.
>=20
>=20
> _______________________________________________
> Dots mailing list
> Dots@ietf.org
> https://www.ietf.org/mailman/listinfo/dots


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From: <mohamed.boucadair@orange.com>
To: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>, "Daniel Migault" <daniel.migault@ericsson.com>
CC: "dots-chairs@ietf.org" <dots-chairs@ietf.org>, Valery Smyslov <valery@smyslov.net>, "dots@ietf.org" <dots@ietf.org>, "kaduk@mit.edu" <kaduk@mit.edu>
Thread-Topic: [Dots] Adoption call for draft-reddy-dots-home-network-04
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Date: Thu, 18 Apr 2019 13:12:56 +0000
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Subject: Re: [Dots] Adoption call for draft-reddy-dots-home-network-04
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From: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>
To: "mohamed.boucadair@orange.com" <mohamed.boucadair@orange.com>, "Daniel Migault" <daniel.migault@ericsson.com>
CC: "dots-chairs@ietf.org" <dots-chairs@ietf.org>, Valery Smyslov <valery@smyslov.net>, "dots@ietf.org" <dots@ietf.org>, "kaduk@mit.edu" <kaduk@mit.edu>
Thread-Topic: [Dots] Adoption call for draft-reddy-dots-home-network-04
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Subject: Re: [Dots] Adoption call for draft-reddy-dots-home-network-04
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From: <mohamed.boucadair@orange.com>
To: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>, "Daniel Migault" <daniel.migault@ericsson.com>
CC: "dots-chairs@ietf.org" <dots-chairs@ietf.org>, Valery Smyslov <valery@smyslov.net>, "dots@ietf.org" <dots@ietf.org>, "kaduk@mit.edu" <kaduk@mit.edu>
Thread-Topic: [Dots] Adoption call for draft-reddy-dots-home-network-04
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--_000_787AE7BB302AE849A7480A190F8B93302EA62A43OPEXCAUBMA2corp_--


From nobody Tue Apr 23 22:01:49 2019
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From: "Valery Smyslov" <valery@smyslov.net>
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Subject: Re: [Dots] Adoption call for draft-reddy-dots-home-network-04
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Hi,

we received a lot of replies supporting adoption of the document.
So, the document is adopted. Authors, please re-submit it as WG draft.

A couple of comments.
1. The draft uses few times a keyword "MAY NOT". This combination is not
     among the list of RFC requirement keywords (it is not listed neither
     in RFC2119, nor in RFC8174). If the intent was to use RFC requirement
     language, then I'd suggest replacing it with one of MUST NOT, SHALL
NOT,
     SHOULD NOT. Otherwise please make it lowcase.

2. When describing transport, the draft allows both TLS and DTLS. What
     makes me confusing is that the draft describes it several times as
"TCP/TLS or DTLS".
     Why TCP is ever mentioned here? We all know that TLS usually runs over 
     TCP (however we now have QUICK) and DTLS runs over UDP. 
     The way it is presented in the draft makes me think that probably 
     plain TCP is also allowed as a transport, but is seems to contradict 
     everything I read about DOTS. Am I missing something here?

Regards,
Valery.



> Hi all,
> 
> the chairs recently received an adoption request for
draft-reddy-dots-home-
> network-04.
> 
> This message starts a two-week adoption call for draft-reddy-dots-home-
> network-04.
> The call ends up on Tuesday, April the 23rd.
> 
> Please send your opinion regarding adoption of this document to the list
> before this date.
> If you think the draft should be adopted, please indicate whether you're
willing
> to review it/to work on it. If you think the draft should not be adopted,
please
> explain why.
> 
> Regards,
> Frank & Valery.



From nobody Tue Apr 23 22:04:17 2019
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From: "Valery Smyslov" <valery@smyslov.net>
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Subject: Re: [Dots] Adoption call for draft-nishizuka-dots-signal-control-filtering-06
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Hi,

we received a lot of replies supporting adoption of the document.
So, the document is adopted. Authors, please re-submit it as WG draft.

One comment.
The draft uses few times a keyword "MAY NOT". This combination is not
among the list of RFC requirement keywords (it is not listed neither
in RFC2119, nor in RFC8174). If the intent was to use RFC requirement
language, then I'd suggest replacing it with one of MUST NOT, SHALL NOT,
SHOULD NOT. Otherwise please make it lowcase.

Regards,
Valery.

> Hi all,
> 
> the chairs recently received an adoption request for draft-nishizuka-dots-
> signal-control-filtering-06.
> 
> This message starts a two-week adoption call for
draft-nishizuka-dots-signal-
> control-filtering-06.
> The call ends up on Tuesday, April the 23rd.
> 
> Please send your opinion regarding adoption of this document to the list
> before this date.
> If you think the draft should be adopted, please indicate whether you're
willing
> to review it/to work on it. If you think the draft should not be adopted,
please
> explain why.
> 
> Regards,
> Frank & Valery.



From nobody Tue Apr 23 22:20:47 2019
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From: <mohamed.boucadair@orange.com>
To: Valery Smyslov <valery@smyslov.net>, "dots@ietf.org" <dots@ietf.org>
CC: "dots-chairs@ietf.org" <dots-chairs@ietf.org>, "kaduk@mit.edu" <kaduk@mit.edu>
Thread-Topic: [Dots] Adoption call for draft-nishizuka-dots-signal-control-filtering-06
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Subject: Re: [Dots] Adoption call for draft-nishizuka-dots-signal-control-filtering-06
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Hi Valery,=20

Will do. Thanks.=20

I fail to see where "MAY NOT" is used in the draft.=20

Cheers,
Med

> -----Message d'origine-----
> De=A0: Dots [mailto:dots-bounces@ietf.org] De la part de Valery Smyslov
> Envoy=E9=A0: mercredi 24 avril 2019 07:04
> =C0=A0: dots@ietf.org
> Cc=A0: dots-chairs@ietf.org; kaduk@mit.edu
> Objet=A0: Re: [Dots] Adoption call for draft-nishizuka-dots-signal-contro=
l-
> filtering-06
>=20
> Hi,
>=20
> we received a lot of replies supporting adoption of the document.
> So, the document is adopted. Authors, please re-submit it as WG draft.
>=20
> One comment.
> The draft uses few times a keyword "MAY NOT". This combination is not
> among the list of RFC requirement keywords (it is not listed neither
> in RFC2119, nor in RFC8174). If the intent was to use RFC requirement
> language, then I'd suggest replacing it with one of MUST NOT, SHALL NOT,
> SHOULD NOT. Otherwise please make it lowcase.
>=20
> Regards,
> Valery.
>=20
> > Hi all,
> >
> > the chairs recently received an adoption request for draft-nishizuka-do=
ts-
> > signal-control-filtering-06.
> >
> > This message starts a two-week adoption call for
> draft-nishizuka-dots-signal-
> > control-filtering-06.
> > The call ends up on Tuesday, April the 23rd.
> >
> > Please send your opinion regarding adoption of this document to the lis=
t
> > before this date.
> > If you think the draft should be adopted, please indicate whether you'r=
e
> willing
> > to review it/to work on it. If you think the draft should not be adopte=
d,
> please
> > explain why.
> >
> > Regards,
> > Frank & Valery.
>=20
>=20
> _______________________________________________
> Dots mailing list
> Dots@ietf.org
> https://www.ietf.org/mailman/listinfo/dots


From nobody Tue Apr 23 22:34:33 2019
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Subject: [Dots] I-D Action: draft-ietf-dots-signal-filter-control-00.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the DDoS Open Threat Signaling WG of the IETF.

        Title           : Controlling Filtering Rules Using Distributed Denial-of-Service Open Threat Signaling (DOTS) Signal Channel
        Authors         : Kaname Nishizuka
                          Mohamed Boucadair
                          Tirumaleswar Reddy
                          Takahiko Nagata
	Filename        : draft-ietf-dots-signal-filter-control-00.txt
	Pages           : 23
	Date            : 2019-04-23

Abstract:
   This document specifies an extension to the DOTS signal channel so
   that DOTS clients can control their filtering rules when an attack
   mitigation is active.

   Particularly, this extension allows a DOTS client to activate or de-
   activate existing filtering rules during a DDoS attack.  The
   characterization of these filtering rules is supposed to be conveyed
   by a DOTS client during an idle time by means of the DOTS data
   channel protocol.

Editorial Note (To be removed by RFC Editor)

   Please update these statements within the document with the RFC
   number to be assigned to this document:

   o  "This version of this YANG module is part of RFC XXXX;"

   o  "RFC XXXX: Controlling Filtering Rules Using Distributed Denial-
      of-Service Open Threat Signaling (DOTS) Signal Channel";

   o  reference: RFC XXXX

   o  [RFCXXXX]

   Please update these statements with the RFC number to be assigned to
   the following documents:

   o  "RFC SSSS: Distributed Denial-of-Service Open Threat Signaling
      (DOTS) Signal Channel Specification" (used to be
      [I-D.ietf-dots-signal-channel])

   o  "RFC DDDD: Distributed Denial-of-Service Open Threat Signaling
      (DOTS) Data Channel Specification" (used to be
      [I-D.ietf-dots-data-channel])

   Please update the "revision" date of the YANG module.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-dots-signal-filter-control/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-dots-signal-filter-control-00
https://datatracker.ietf.org/doc/html/draft-ietf-dots-signal-filter-control-00


Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/


From nobody Tue Apr 23 22:40:34 2019
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From: "Valery Smyslov" <valery@smyslov.net>
To: <mohamed.boucadair@orange.com>, <dots@ietf.org>
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Subject: Re: [Dots] Adoption call for draft-nishizuka-dots-signal-control-filtering-06
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Hi Med,

> Hi Valery,
>=20
> Will do. Thanks.
>=20
> I fail to see where "MAY NOT" is used in the draft.

You are right, it is used uppercase only in home-network draft.
I read both the drafts a while ago and probably mixed up=20
the references when checking this.

Thank you,
Valery.

> Cheers,
> Med
>=20
> > -----Message d'origine-----
> > De=A0: Dots [mailto:dots-bounces@ietf.org] De la part de Valery =
Smyslov
> > Envoy=E9=A0: mercredi 24 avril 2019 07:04 =C0=A0: dots@ietf.org =
Cc=A0:
> > dots-chairs@ietf.org; kaduk@mit.edu Objet=A0: Re: [Dots] Adoption =
call
> > for draft-nishizuka-dots-signal-control-
> > filtering-06
> >
> > Hi,
> >
> > we received a lot of replies supporting adoption of the document.
> > So, the document is adopted. Authors, please re-submit it as WG =
draft.
> >
> > One comment.
> > The draft uses few times a keyword "MAY NOT". This combination is =
not
> > among the list of RFC requirement keywords (it is not listed neither
> > in RFC2119, nor in RFC8174). If the intent was to use RFC =
requirement
> > language, then I'd suggest replacing it with one of MUST NOT, SHALL
> > NOT, SHOULD NOT. Otherwise please make it lowcase.
> >
> > Regards,
> > Valery.
> >
> > > Hi all,
> > >
> > > the chairs recently received an adoption request for
> > > draft-nishizuka-dots- signal-control-filtering-06.
> > >
> > > This message starts a two-week adoption call for
> > draft-nishizuka-dots-signal-
> > > control-filtering-06.
> > > The call ends up on Tuesday, April the 23rd.
> > >
> > > Please send your opinion regarding adoption of this document to =
the
> > > list before this date.
> > > If you think the draft should be adopted, please indicate whether
> > > you're
> > willing
> > > to review it/to work on it. If you think the draft should not be
> > > adopted,
> > please
> > > explain why.
> > >
> > > Regards,
> > > Frank & Valery.
> >
> >
> > _______________________________________________
> > Dots mailing list
> > Dots@ietf.org
> > https://www.ietf.org/mailman/listinfo/dots


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From: <mohamed.boucadair@orange.com>
To: Valery Smyslov <valery@smyslov.net>, "dots@ietf.org" <dots@ietf.org>
CC: "dots-chairs@ietf.org" <dots-chairs@ietf.org>, "kaduk@mit.edu" <kaduk@mit.edu>
Thread-Topic: [Dots] Adoption call for draft-reddy-dots-home-network-04
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Subject: Re: [Dots] Adoption call for draft-reddy-dots-home-network-04
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Re-,

Please see inline.

Cheers,
Med

> -----Message d'origine-----
> De=A0: Dots [mailto:dots-bounces@ietf.org] De la part de Valery Smyslov
> Envoy=E9=A0: mercredi 24 avril 2019 07:02
> =C0=A0: dots@ietf.org
> Cc=A0: dots-chairs@ietf.org; kaduk@mit.edu
> Objet=A0: Re: [Dots] Adoption call for draft-reddy-dots-home-network-04
>=20
> Hi,
>=20
> we received a lot of replies supporting adoption of the document.
> So, the document is adopted. Authors, please re-submit it as WG draft.
>=20
> A couple of comments.
> 1. The draft uses few times a keyword "MAY NOT". This combination is not
>      among the list of RFC requirement keywords (it is not listed neither
>      in RFC2119, nor in RFC8174). If the intent was to use RFC requiremen=
t
>      language, then I'd suggest replacing it with one of MUST NOT, SHALL
> NOT,
>      SHOULD NOT. Otherwise please make it lowcase.
>=20

[Med] Good catch. Fixed.=20

> 2. When describing transport, the draft allows both TLS and DTLS. What
>      makes me confusing is that the draft describes it several times as
> "TCP/TLS or DTLS".
>      Why TCP is ever mentioned here? We all know that TLS usually runs ov=
er
>      TCP (however we now have QUICK) and DTLS runs over UDP.
>      The way it is presented in the draft makes me think that probably
>      plain TCP is also allowed as a transport, but is seems to contradict
>      everything I read about DOTS. Am I missing something here?
>=20

[Med] Plain TCP is not allowed. The intent was to be explicit that there is=
 a reversal in both TCP and TLS layers, but as you rightfully raised this m=
ay be confusing since, for the DOTS case, it is trivial that the reversal o=
f TLS roles implies the reversal of TCP ones. The use of TCP/TLS is OK but =
may be confusing. I changed TCP/TLS to TLS. =20

> Regards,
> Valery.
>=20
>=20
>=20
> > Hi all,
> >
> > the chairs recently received an adoption request for
> draft-reddy-dots-home-
> > network-04.
> >
> > This message starts a two-week adoption call for draft-reddy-dots-home-
> > network-04.
> > The call ends up on Tuesday, April the 23rd.
> >
> > Please send your opinion regarding adoption of this document to the lis=
t
> > before this date.
> > If you think the draft should be adopted, please indicate whether you'r=
e
> willing
> > to review it/to work on it. If you think the draft should not be adopte=
d,
> please
> > explain why.
> >
> > Regards,
> > Frank & Valery.
>=20
>=20
> _______________________________________________
> Dots mailing list
> Dots@ietf.org
> https://www.ietf.org/mailman/listinfo/dots


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Subject: [Dots] I-D Action: draft-ietf-dots-signal-call-home-00.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the DDoS Open Threat Signaling WG of the IETF.

        Title           : Distributed Denial-of-Service Open Threat Signaling (DOTS) Signal Channel Call Home
        Authors         : Tirumaleswar Reddy
                          Mohamed Boucadair
                          Jon Shallow
	Filename        : draft-ietf-dots-signal-call-home-00.txt
	Pages           : 18
	Date            : 2019-04-23

Abstract:
   This document presents DOTS signal channel Call Home service, which
   enables a DOTS server to initiate a secure connection to a DOTS
   client, and to receive the attack traffic information from the DOTS
   client.  The DOTS server in turn uses the attack traffic information
   to identify the compromised devices launching the outgoing DDoS
   attack and takes appropriate mitigation action.

   The Call Home service is not specific to the home networks; the
   solution targets any deployment which requires to block DDoS attack
   traffic closer to the source(s) of a DDoS attack.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-dots-signal-call-home/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-dots-signal-call-home-00
https://datatracker.ietf.org/doc/html/draft-ietf-dots-signal-call-home-00


Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/


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From: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>
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Subject: Re: [Dots] Adoption call for draft-reddy-dots-home-network-04
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From nobody Tue Apr 23 23:24:42 2019
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From: <mohamed.boucadair@orange.com>
To: "dots@ietf.org" <dots@ietf.org>
Thread-Topic: (draft-ietf-dots-signal-filter-control) ACL Stats issue
Thread-Index: AdT6ZmI8uG0f606MQBW+/9uvcTWn6Q==
Date: Wed, 24 Apr 2019 06:24:35 +0000
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Subject: [Dots] (draft-ietf-dots-signal-filter-control) ACL Stats issue
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Hi all,=20

We do have one pending issue to be resolved for this draft. The issue is av=
ailable at:=20
https://github.com/boucadair/filter-control/issues/1=20

We need your feedback on this.=20

Cheers,
Med

> -----Message d'origine-----
> De=A0: Dots [mailto:dots-bounces@ietf.org] De la part de internet-
> drafts@ietf.org
> Envoy=E9=A0: mercredi 24 avril 2019 07:34
> =C0=A0: i-d-announce@ietf.org
> Cc=A0: dots@ietf.org
> Objet=A0: [Dots] I-D Action: draft-ietf-dots-signal-filter-control-00.txt
>=20
>=20
> A New Internet-Draft is available from the on-line Internet-Drafts
> directories.
> This draft is a work item of the DDoS Open Threat Signaling WG of the IET=
F.
>=20
>         Title           : Controlling Filtering Rules Using Distributed
> Denial-of-Service Open Threat Signaling (DOTS) Signal Channel
>         Authors         : Kaname Nishizuka
>                           Mohamed Boucadair
>                           Tirumaleswar Reddy
>                           Takahiko Nagata
> 	Filename        : draft-ietf-dots-signal-filter-control-00.txt
> 	Pages           : 23
> 	Date            : 2019-04-23
>=20
> Abstract:
>    This document specifies an extension to the DOTS signal channel so
>    that DOTS clients can control their filtering rules when an attack
>    mitigation is active.
>=20
>    Particularly, this extension allows a DOTS client to activate or de-
>    activate existing filtering rules during a DDoS attack.  The
>    characterization of these filtering rules is supposed to be conveyed
>    by a DOTS client during an idle time by means of the DOTS data
>    channel protocol.
>=20
> Editorial Note (To be removed by RFC Editor)
>=20
>    Please update these statements within the document with the RFC
>    number to be assigned to this document:
>=20
>    o  "This version of this YANG module is part of RFC XXXX;"
>=20
>    o  "RFC XXXX: Controlling Filtering Rules Using Distributed Denial-
>       of-Service Open Threat Signaling (DOTS) Signal Channel";
>=20
>    o  reference: RFC XXXX
>=20
>    o  [RFCXXXX]
>=20
>    Please update these statements with the RFC number to be assigned to
>    the following documents:
>=20
>    o  "RFC SSSS: Distributed Denial-of-Service Open Threat Signaling
>       (DOTS) Signal Channel Specification" (used to be
>       [I-D.ietf-dots-signal-channel])
>=20
>    o  "RFC DDDD: Distributed Denial-of-Service Open Threat Signaling
>       (DOTS) Data Channel Specification" (used to be
>       [I-D.ietf-dots-data-channel])
>=20
>    Please update the "revision" date of the YANG module.
>=20
>=20
> The IETF datatracker status page for this draft is:
> https://datatracker.ietf.org/doc/draft-ietf-dots-signal-filter-control/
>=20
> There are also htmlized versions available at:
> https://tools.ietf.org/html/draft-ietf-dots-signal-filter-control-00
> https://datatracker.ietf.org/doc/html/draft-ietf-dots-signal-filter-contr=
ol-
> 00
>=20
>=20
> Please note that it may take a couple of minutes from the time of submiss=
ion
> until the htmlized version and diff are available at tools.ietf.org.
>=20
> Internet-Drafts are also available by anonymous FTP at:
> ftp://ftp.ietf.org/internet-drafts/
>=20
> _______________________________________________
> Dots mailing list
> Dots@ietf.org
> https://www.ietf.org/mailman/listinfo/dots


From nobody Tue Apr 23 23:47:45 2019
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From: <mohamed.boucadair@orange.com>
To: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>, "Valery Smyslov" <valery@smyslov.net>, "dots@ietf.org" <dots@ietf.org>
CC: "dots-chairs@ietf.org" <dots-chairs@ietf.org>, "kaduk@mit.edu" <kaduk@mit.edu>
Thread-Topic: [Dots] Adoption call for draft-reddy-dots-home-network-04
Thread-Index: AdTuHVZNyfDh6IMnTiyfhZP8vM2pOAMPXcMAAAHlewAAACVi8AABQijQ
Date: Wed, 24 Apr 2019 06:47:34 +0000
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Subject: Re: [Dots] Adoption call for draft-reddy-dots-home-network-04
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From: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>
To: "mohamed.boucadair@orange.com" <mohamed.boucadair@orange.com>, "Valery Smyslov" <valery@smyslov.net>, "dots@ietf.org" <dots@ietf.org>
CC: "dots-chairs@ietf.org" <dots-chairs@ietf.org>, "kaduk@mit.edu" <kaduk@mit.edu>
Thread-Topic: [Dots] Adoption call for draft-reddy-dots-home-network-04
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Subject: Re: [Dots] Adoption call for draft-reddy-dots-home-network-04
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From: <mohamed.boucadair@orange.com>
To: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>, "Valery Smyslov" <valery@smyslov.net>, "dots@ietf.org" <dots@ietf.org>
CC: "dots-chairs@ietf.org" <dots-chairs@ietf.org>, "kaduk@mit.edu" <kaduk@mit.edu>
Thread-Topic: [Dots] Adoption call for draft-reddy-dots-home-network-04
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Date: Wed, 24 Apr 2019 11:18:23 +0000
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Subject: Re: [Dots] Adoption call for draft-reddy-dots-home-network-04
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From: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>
To: "mohamed.boucadair@orange.com" <mohamed.boucadair@orange.com>, "Valery Smyslov" <valery@smyslov.net>, "dots@ietf.org" <dots@ietf.org>
CC: "dots-chairs@ietf.org" <dots-chairs@ietf.org>, "kaduk@mit.edu" <kaduk@mit.edu>
Thread-Topic: [Dots] Adoption call for draft-reddy-dots-home-network-04
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Subject: Re: [Dots] Adoption call for draft-reddy-dots-home-network-04
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From: <mohamed.boucadair@orange.com>
To: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>, "Valery Smyslov" <valery@smyslov.net>, "dots@ietf.org" <dots@ietf.org>
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Thread-Topic: [Dots] Adoption call for draft-reddy-dots-home-network-04
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Subject: Re: [Dots] Adoption call for draft-reddy-dots-home-network-04
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From: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>
To: "mohamed.boucadair@orange.com" <mohamed.boucadair@orange.com>, "Valery Smyslov" <valery@smyslov.net>, "dots@ietf.org" <dots@ietf.org>
CC: "dots-chairs@ietf.org" <dots-chairs@ietf.org>, "kaduk@mit.edu" <kaduk@mit.edu>
Thread-Topic: [Dots] Adoption call for draft-reddy-dots-home-network-04
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Subject: Re: [Dots] Adoption call for draft-reddy-dots-home-network-04
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From: <mohamed.boucadair@orange.com>
To: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>
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Thread-Topic: [Dots] Adoption call for draft-reddy-dots-home-network-04
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Date: Thu, 25 Apr 2019 06:13:32 +0000
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Subject: Re: [Dots] Adoption call for draft-reddy-dots-home-network-04
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From: <mohamed.boucadair@orange.com>
To: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>, "Daniel Migault" <daniel.migault@ericsson.com>
CC: "dots@ietf.org" <dots@ietf.org>
Thread-Topic: [Dots] Adoption call for draft-reddy-dots-home-network-04
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Date: Thu, 25 Apr 2019 06:58:39 +0000
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From nobody Thu Apr 25 01:59:39 2019
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To: mohamed.boucadair@orange.com, "dots@ietf.org" <dots@ietf.org>
References: <787AE7BB302AE849A7480A190F8B93302EA649B4@OPEXCAUBMA2.corporate.adroot.infra.ftgroup>
From: kaname nishizuka <kaname@nttv6.jp>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/dots/uEDMhw1DjArAGrMvfYA8svr-c2w>
Subject: Re: [Dots] (draft-ietf-dots-signal-filter-control) ACL Stats issue
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Hi Med, all,

Regarding with the issue, I'm not convinced of the benefit to return the activated ACL statistics over signal-channel.

The idea of this draft is based on this situation (quoted from Jon's comment):
(It is) very unreliable when the inbound pipe is running full.  If the pipe is not running full, then this information can be obtained over the data channel.

ACL stats can be get over the data-channel. I don't see any reason to reproduce the same function.

Further more, I don't think the DOTS server should notify that DOTS client with the change by including the corresponding acl-* parameters in an asynchronous notification.
The basic behavior is already written in the draft:
    This specification does not require any modification to the efficacy
    update and the withdrawal procedures defined in
    [I-D.ietf-dots-signal-channel].  In particular, ACL-related clauses
    are not included in a PUT request used to send an efficacy update and
    DELETE requests.

If so, the server need not to store any resource about acl-* per mitigation request, which make the function of the signal-filter-control simple enough.

thanks,
Kaname

On 2019/04/24 15:24, mohamed.boucadair@orange.com wrote:
> Hi all,
>
> We do have one pending issue to be resolved for this draft. The issue is available at:
> https://github.com/boucadair/filter-control/issues/1
>
> We need your feedback on this.
>
> Cheers,
> Med
>
>> -----Message d'origine-----
>> De : Dots [mailto:dots-bounces@ietf.org] De la part de internet-
>> drafts@ietf.org
>> Envoyé : mercredi 24 avril 2019 07:34
>> À : i-d-announce@ietf.org
>> Cc : dots@ietf.org
>> Objet : [Dots] I-D Action: draft-ietf-dots-signal-filter-control-00.txt
>>
>>
>> A New Internet-Draft is available from the on-line Internet-Drafts
>> directories.
>> This draft is a work item of the DDoS Open Threat Signaling WG of the IETF.
>>
>>          Title           : Controlling Filtering Rules Using Distributed
>> Denial-of-Service Open Threat Signaling (DOTS) Signal Channel
>>          Authors         : Kaname Nishizuka
>>                            Mohamed Boucadair
>>                            Tirumaleswar Reddy
>>                            Takahiko Nagata
>> 	Filename        : draft-ietf-dots-signal-filter-control-00.txt
>> 	Pages           : 23
>> 	Date            : 2019-04-23
>>
>> Abstract:
>>     This document specifies an extension to the DOTS signal channel so
>>     that DOTS clients can control their filtering rules when an attack
>>     mitigation is active.
>>
>>     Particularly, this extension allows a DOTS client to activate or de-
>>     activate existing filtering rules during a DDoS attack.  The
>>     characterization of these filtering rules is supposed to be conveyed
>>     by a DOTS client during an idle time by means of the DOTS data
>>     channel protocol.
>>
>> Editorial Note (To be removed by RFC Editor)
>>
>>     Please update these statements within the document with the RFC
>>     number to be assigned to this document:
>>
>>     o  "This version of this YANG module is part of RFC XXXX;"
>>
>>     o  "RFC XXXX: Controlling Filtering Rules Using Distributed Denial-
>>        of-Service Open Threat Signaling (DOTS) Signal Channel";
>>
>>     o  reference: RFC XXXX
>>
>>     o  [RFCXXXX]
>>
>>     Please update these statements with the RFC number to be assigned to
>>     the following documents:
>>
>>     o  "RFC SSSS: Distributed Denial-of-Service Open Threat Signaling
>>        (DOTS) Signal Channel Specification" (used to be
>>        [I-D.ietf-dots-signal-channel])
>>
>>     o  "RFC DDDD: Distributed Denial-of-Service Open Threat Signaling
>>        (DOTS) Data Channel Specification" (used to be
>>        [I-D.ietf-dots-data-channel])
>>
>>     Please update the "revision" date of the YANG module.
>>
>>
>> The IETF datatracker status page for this draft is:
>> https://datatracker.ietf.org/doc/draft-ietf-dots-signal-filter-control/
>>
>> There are also htmlized versions available at:
>> https://tools.ietf.org/html/draft-ietf-dots-signal-filter-control-00
>> https://datatracker.ietf.org/doc/html/draft-ietf-dots-signal-filter-control-
>> 00
>>
>>
>> Please note that it may take a couple of minutes from the time of submission
>> until the htmlized version and diff are available at tools.ietf.org.
>>
>> Internet-Drafts are also available by anonymous FTP at:
>> ftp://ftp.ietf.org/internet-drafts/
>>
>> _______________________________________________
>> Dots mailing list
>> Dots@ietf.org
>> https://www.ietf.org/mailman/listinfo/dots
> _______________________________________________
> Dots mailing list
> Dots@ietf.org
> https://www.ietf.org/mailman/listinfo/dots


From nobody Thu Apr 25 02:28:18 2019
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From: "Jon Shallow" <supjps-ietf@jpshallow.com>
To: "'kaname nishizuka'" <kaname@nttv6.jp>, <mohamed.boucadair@orange.com>, <dots@ietf.org>
References: <787AE7BB302AE849A7480A190F8B93302EA649B4@OPEXCAUBMA2.corporate.adroot.infra.ftgroup> <c3c9614f-908a-c132-cd35-6c627e341f2b@nttv6.jp>
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Date: Thu, 25 Apr 2019 10:28:07 +0100
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Subject: Re: [Dots] (draft-ietf-dots-signal-filter-control) ACL Stats issue
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Hi there,

The advantage of separating out the counters for the different ACLs is =
that the DOTS client can then determine what is being effective or not.  =
However, if (signal) data is able to get from the DOTS server to the =
DOTS client, then it is likely that the data channel will still be =
operable and can be used to get these numbers so I still do not think =
that this should be over the signal channel.

I think that that the GET response (or observe response) bytes-dropped =
etc. should be the total dropped - i.e. the sum of the ACls and what the =
DMS is otherwise doing as it refers to the mitigation request.

Regards

Jon

> -----Original Message-----
> From: Dots [mailto: dots-bounces@ietf.org] On Behalf Of kaname
> nishizuka
> Sent: 25 April 2019 10:00
> To: mohamed.boucadair@orange.com; dots@ietf.org
> Subject: Re: [Dots] (draft-ietf-dots-signal-filter-control) ACL Stats =
issue
>=20
> Hi Med, all,
>=20
> Regarding with the issue, I'm not convinced of the benefit to return =
the
> activated ACL statistics over signal-channel.
>=20
> The idea of this draft is based on this situation (quoted from Jon's
> comment):
> (It is) very unreliable when the inbound pipe is running full.  If the =
pipe is not
> running full, then this information can be obtained over the data =
channel.
>=20
> ACL stats can be get over the data-channel. I don't see any reason to
> reproduce the same function.
>=20
> Further more, I don't think the DOTS server should notify that DOTS =
client
> with the change by including the corresponding acl-* parameters in an
> asynchronous notification.
> The basic behavior is already written in the draft:
>     This specification does not require any modification to the =
efficacy
>     update and the withdrawal procedures defined in
>     [I-D.ietf-dots-signal-channel].  In particular, ACL-related =
clauses
>     are not included in a PUT request used to send an efficacy update =
and
>     DELETE requests.
>=20
> If so, the server need not to store any resource about acl-* per =
mitigation
> request, which make the function of the signal-filter-control simple =
enough.
>=20
> thanks,
> Kaname
>=20
> On 2019/04/24 15:24, mohamed.boucadair@orange.com wrote:
> > Hi all,
> >
> > We do have one pending issue to be resolved for this draft. The =
issue is
> available at:
> > https://github.com/boucadair/filter-control/issues/1
> >
> > We need your feedback on this.
> >
> > Cheers,
> > Med
> >
> >> -----Message d'origine-----
> >> De : Dots [mailto:dots-bounces@ietf.org] De la part de internet-
> >> drafts@ietf.org
> >> Envoy=C3=A9 : mercredi 24 avril 2019 07:34
> >> =C3=80 : i-d-announce@ietf.org
> >> Cc : dots@ietf.org
> >> Objet : [Dots] I-D Action: =
draft-ietf-dots-signal-filter-control-00.txt
> >>
> >>
> >> A New Internet-Draft is available from the on-line Internet-Drafts
> >> directories.
> >> This draft is a work item of the DDoS Open Threat Signaling WG of =
the
> IETF.
> >>
> >>          Title           : Controlling Filtering Rules Using =
Distributed
> >> Denial-of-Service Open Threat Signaling (DOTS) Signal Channel
> >>          Authors         : Kaname Nishizuka
> >>                            Mohamed Boucadair
> >>                            Tirumaleswar Reddy
> >>                            Takahiko Nagata
> >> 	Filename        : draft-ietf-dots-signal-filter-control-00.txt
> >> 	Pages           : 23
> >> 	Date            : 2019-04-23
> >>
> >> Abstract:
> >>     This document specifies an extension to the DOTS signal channel =
so
> >>     that DOTS clients can control their filtering rules when an =
attack
> >>     mitigation is active.
> >>
> >>     Particularly, this extension allows a DOTS client to activate =
or de-
> >>     activate existing filtering rules during a DDoS attack.  The
> >>     characterization of these filtering rules is supposed to be =
conveyed
> >>     by a DOTS client during an idle time by means of the DOTS data
> >>     channel protocol.
> >>
> >> Editorial Note (To be removed by RFC Editor)
> >>
> >>     Please update these statements within the document with the RFC
> >>     number to be assigned to this document:
> >>
> >>     o  "This version of this YANG module is part of RFC XXXX;"
> >>
> >>     o  "RFC XXXX: Controlling Filtering Rules Using Distributed =
Denial-
> >>        of-Service Open Threat Signaling (DOTS) Signal Channel";
> >>
> >>     o  reference: RFC XXXX
> >>
> >>     o  [RFCXXXX]
> >>
> >>     Please update these statements with the RFC number to be =
assigned to
> >>     the following documents:
> >>
> >>     o  "RFC SSSS: Distributed Denial-of-Service Open Threat =
Signaling
> >>        (DOTS) Signal Channel Specification" (used to be
> >>        [I-D.ietf-dots-signal-channel])
> >>
> >>     o  "RFC DDDD: Distributed Denial-of-Service Open Threat =
Signaling
> >>        (DOTS) Data Channel Specification" (used to be
> >>        [I-D.ietf-dots-data-channel])
> >>
> >>     Please update the "revision" date of the YANG module.
> >>
> >>
> >> The IETF datatracker status page for this draft is:
> >> =
https://datatracker.ietf.org/doc/draft-ietf-dots-signal-filter-control/
> >>
> >> There are also htmlized versions available at:
> >> =
https://tools.ietf.org/html/draft-ietf-dots-signal-filter-control-00
> >> =
https://datatracker.ietf.org/doc/html/draft-ietf-dots-signal-filter-contr=
ol-
> >> 00
> >>
> >>
> >> Please note that it may take a couple of minutes from the time of
> submission
> >> until the htmlized version and diff are available at =
tools.ietf.org.
> >>
> >> Internet-Drafts are also available by anonymous FTP at:
> >> ftp://ftp.ietf.org/internet-drafts/
> >>
> >> _______________________________________________
> >> Dots mailing list
> >> Dots@ietf.org
> >> https://www.ietf.org/mailman/listinfo/dots
> > _______________________________________________
> > Dots mailing list
> > Dots@ietf.org
> > https://www.ietf.org/mailman/listinfo/dots
>=20
> _______________________________________________
> Dots mailing list
> Dots@ietf.org
> https://www.ietf.org/mailman/listinfo/dots


From nobody Thu Apr 25 03:27:33 2019
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From: "Jon Shallow" <supjps-ietf@jpshallow.com>
To: <mohamed.boucadair@orange.com>, "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@mcafee.com>, <dots@ietf.org>
References: <023d01d4ee1f$c2bcb190$483614b0$@smyslov.net> <019001d4fa5a$cf08fb60$6d1af220$@smyslov.net> <787AE7BB302AE849A7480A190F8B93302EA648E7@OPEXCAUBMA2.corporate.adroot.infra.ftgroup> <BYAPR16MB27907ABC5E91DD572EBE7807EA3C0@BYAPR16MB2790.namprd16.prod.outlook.com> <787AE7BB302AE849A7480A190F8B93302EA649DB@OPEXCAUBMA2.corporate.adroot.infra.ftgroup> <BYAPR16MB2790ED963937C8C15B319F63EA3C0@BYAPR16MB2790.namprd16.prod.outlook.com> <787AE7BB302AE849A7480A190F8B93302EA64C46@OPEXCAUBMA2.corporate.adroot.infra.ftgroup> <BYAPR16MB27902B9175E96A2062D06E83EA3C0@BYAPR16MB2790.namprd16.prod.outlook.com> <787AE7BB302AE849A7480A190F8B93302EA64E53@OPEXCAUBMA2.corporate.adroot.infra.ftgroup> <BYAPR16MB27908314C1236FE8846984E5EA3C0@BYAPR16MB2790.namprd16.prod.outlook.com> <787AE7BB302AE849A7480A190F8B93302EA656B7@OPEXCAUBMA2.corporate.adroot.infra.ftgroup>
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Date: Thu, 25 Apr 2019 11:27:23 +0100
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Subject: Re: [Dots] Adoption call for draft-reddy-dots-home-network-04
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Hi Med / Tiru,

I am having a hard time working out how to implement this Call Home =
using libcoap.

The easiest way in my current thinking is that the role reversal should =
only be at the UDP or TCP layer and then (D)TLS is set up / initiated by =
the DOTS client to the DOTS server (and is how RFC8071 defines the setup =
of the security layer over TCP).

Otherwise, libcoap needs to be taught that (D)TLS set up is in the =
reverse direction to the CoAP transfers which would involve a =
significant re-write and a lot of clarity in the code (e.g. am I a =
server or a client at this point of working in the network stack?).

Just establishing a session 5 tuple in the reverse direction and then =
remembering this only for the UDP/TCP layer is a simple libcoap change.

So, I would like to see it as (as per RFC8071 Figure 1:)

                  DOTS                                   DOTS
                  Server                                 Client
                    |                                                 |
                    |         1.  TCP or UDP              |
                    |----------------------------------->|
                    |         2.  (D)TLS  set up          |
                    |<-----------------------------------|
                    |         3. Mitigation request   |
                    |<-----------------------------------|
                    |                                                 |

Regards

Jon
> -----Original Message-----
> From: Dots [mailto: dots-bounces@ietf.org] On Behalf Of =
mohamed.boucadair@orange.com
> Sent: 25 April 2019 07:14
> To: Konda, Tirumaleswar Reddy
> Cc: dots@ietf.org
> Subject: Re: [Dots] Adoption call for draft-reddy-dots-home-network-04
>=20
> Hi Tiru,
>=20
> Works for me.
>=20
> An updated version with a slightly updated wording is available at:
> =
https://github.com/boucadair/dots-call-home/blob/master/draft-ietf-dots-
> signal-call-home-00.txt
>=20
> Cheers,
> Med
>=20
> > -----Message d'origine-----
> > De : Konda, Tirumaleswar Reddy
> [mailto:TirumaleswarReddy_Konda@McAfee.com]
> > Envoy=C3=A9 : mercredi 24 avril 2019 15:26
> > =C3=80 : BOUCADAIR Mohamed TGI/OLN; Valery Smyslov; dots@ietf.org
> > Cc : dots-chairs@ietf.org; kaduk@mit.edu
> > Objet : RE: [Dots] Adoption call for =
draft-reddy-dots-home-network-04
> >
> > > -----Original Message-----
> > > From: mohamed.boucadair@orange.com
> > > <mohamed.boucadair@orange.com>
> > > Sent: Wednesday, April 24, 2019 6:42 PM
> > > To: Konda, Tirumaleswar Reddy
> > > <TirumaleswarReddy_Konda@McAfee.com>; Valery Smyslov
> > > <valery@smyslov.net>; dots@ietf.org
> > > Cc: dots-chairs@ietf.org; kaduk@mit.edu
> > > Subject: RE: [Dots] Adoption call for =
draft-reddy-dots-home-network-04
> > >
> > > This email originated from outside of the organization. Do not =
click links
> > or
> > > open attachments unless you recognize the sender and know the
> content is
> > > safe.
> > >
> > > Re-,
> > >
> > > Please see inline.
> > >
> > > Cheers,
> > > Med
> > > > -----Message d'origine-----
> > > > De : Konda, Tirumaleswar Reddy
> > > > [mailto:TirumaleswarReddy_Konda@McAfee.com]
> > > > Envoy=C3=A9 : mercredi 24 avril 2019 14:56
> > > > =C3=80 : BOUCADAIR Mohamed TGI/OLN; Valery Smyslov; =
dots@ietf.org Cc :
> > > > dots-chairs@ietf.org; kaduk@mit.edu Objet : RE: [Dots] Adoption =
call
> > > > for draft-reddy-dots-home-network-04
> > > >
> > > > > -----Original Message-----
> > > > > From: mohamed.boucadair@orange.com
> > > > > <mohamed.boucadair@orange.com>
> > > > > Sent: Wednesday, April 24, 2019 4:48 PM
> > > > > To: Konda, Tirumaleswar Reddy
> > > > > <TirumaleswarReddy_Konda@McAfee.com>; Valery Smyslov
> > > > > <valery@smyslov.net>; dots@ietf.org
> > > > > Cc: dots-chairs@ietf.org; kaduk@mit.edu
> > > > > Subject: RE: [Dots] Adoption call for
> > > > > draft-reddy-dots-home-network-04
> > > > >
> > > > > This email originated from outside of the organization. Do not =
click
> > > > > links
> > > > or
> > > > > open attachments unless you recognize the sender and know the
> > > > > content is safe.
> > > > >
> > > > > Re-,
> > > > >
> > > > > Please see inline.
> > > > >
> > > > > Cheers,
> > > > > Med
> > > > >
> > > > > > -----Message d'origine-----
> > > > > > De : Konda, Tirumaleswar Reddy
> > > > > > [mailto:TirumaleswarReddy_Konda@McAfee.com]
> > > > > > Envoy=C3=A9 : mercredi 24 avril 2019 13:01 =C3=80 : =
BOUCADAIR Mohamed
> > > > > > TGI/OLN; Valery Smyslov; dots@ietf.org Cc :
> > > > > > dots-chairs@ietf.org; kaduk@mit.edu Objet : RE: [Dots] =
Adoption
> > > > > > call for draft-reddy-dots-home-network-04
> > > > > >
> > > > > > > -----Original Message-----
> > > > > > > From: mohamed.boucadair@orange.com
> > > > > > > <mohamed.boucadair@orange.com>
> > > > > > > Sent: Wednesday, April 24, 2019 12:18 PM
> > > > > > > To: Konda, Tirumaleswar Reddy
> > > > > > > <TirumaleswarReddy_Konda@McAfee.com>; Valery Smyslov
> > > > > > > <valery@smyslov.net>; dots@ietf.org
> > > > > > > Cc: dots-chairs@ietf.org; kaduk@mit.edu
> > > > > > > Subject: RE: [Dots] Adoption call for
> > > > > > > draft-reddy-dots-home-network-04
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > > Re-,
> > > > > > >
> > > > > > > Please see inline.
> > > > > > >
> > > > > > > Cheers,
> > > > > > > Med
> > > > > > >
> > > > > > > > -----Message d'origine-----
> > > > > > > > De : Konda, Tirumaleswar Reddy
> > > > > > > > [mailto:TirumaleswarReddy_Konda@McAfee.com]
> > > > > > > > Envoy=C3=A9 : mercredi 24 avril 2019 08:13 =C3=80 : =
BOUCADAIR Mohamed
> > > > > > > > TGI/OLN; Valery Smyslov; dots@ietf.org Cc :
> > > > > > > > dots-chairs@ietf.org; kaduk@mit.edu Objet : RE: [Dots]
> > > > > > > > Adoption call for draft-reddy-dots-home-network-04
> > > > > > > >
> > > > > > > > > -----Original Message-----
> > > > > > > > > From: Dots <dots-bounces@ietf.org> On Behalf Of
> > > > > > > > > mohamed.boucadair@orange.com
> > > > > > > > > Sent: Wednesday, April 24, 2019 11:26 AM
> > > > > > > > > To: Valery Smyslov <valery@smyslov.net>; dots@ietf.org
> > > > > > > > > Cc: dots-chairs@ietf.org; kaduk@mit.edu
> > > > > > > > > Subject: Re: [Dots] Adoption call for
> > > > > > > > > draft-reddy-dots-home-network-04
> > > > > > > > >
> > > > > > > > > This email originated from outside of the =
organization. Do
> > > > > > > > > not click links
> > > > > > > > or
> > > > > > > > > open attachments unless you recognize the sender and =
know
> > > > > > > > > the content is safe.
> > > > > > > > >
> > > > > > > > > Re-,
> > > > > > > > >
> > > > > > > > > Please see inline.
> > > > > > > > >
> > > > > > > > > Cheers,
> > > > > > > > > Med
> > > > > > > > >
> > > > > > > > > > -----Message d'origine----- De : Dots
> > > > > > > > > > [mailto:dots-bounces@ietf.org] De la part de Valery
> > > > > > > > > > Smyslov Envoy=C3=A9 : mercredi 24 avril 2019 07:02 =
=C3=80 :
> > > > > > > > > > dots@ietf.org
> > > > Cc :
> > > > > > > > > > dots-chairs@ietf.org; kaduk@mit.edu Objet : Re: =
[Dots]
> > > > > > > > > > Adoption call for draft-reddy-dots-home-network-04
> > > > > > > > > >
> > > > > > > > > > Hi,
> > > > > > > > > >
> > > > > > > > > > we received a lot of replies supporting adoption of =
the
> > > document.
> > > > > > > > > > So, the document is adopted. Authors, please =
re-submit it
> > > > > > > > > > as WG
> > > > > > draft.
> > > > > > > > > >
> > > > > > > > > > A couple of comments.
> > > > > > > > > > 1. The draft uses few times a keyword "MAY NOT". =
This
> > > > > > > > > > combination is
> > > > > > > not
> > > > > > > > > >      among the list of RFC requirement keywords (it =
is not
> > > > > > > > > > listed
> > > > > > neither
> > > > > > > > > >      in RFC2119, nor in RFC8174). If the intent was =
to use
> > > > > > > > > > RFC
> > > > > > > > requirement
> > > > > > > > > >      language, then I'd suggest replacing it with =
one of
> > > > > > > > > > MUST NOT, SHALL NOT,
> > > > > > > > > >      SHOULD NOT. Otherwise please make it lowcase.
> > > > > > > > > >
> > > > > > > > >
> > > > > > > > > [Med] Good catch. Fixed.
> > > > > > > > >
> > > > > > > > > > 2. When describing transport, the draft allows both =
TLS and
> > DTLS.
> > > > > > What
> > > > > > > > > >      makes me confusing is that the draft describes =
it
> > > > > > > > > > several times as "TCP/TLS or DTLS".
> > > > > > > > > >      Why TCP is ever mentioned here? We all know =
that TLS
> > > > > > > > > > usually runs
> > > > > > > > over
> > > > > > > > > >      TCP (however we now have QUICK) and DTLS runs =
over
> UDP.
> > > > > > > > > >      The way it is presented in the draft makes me =
think
> > > > > > > > > > that
> > > > > > probably
> > > > > > > > > >      plain TCP is also allowed as a transport, but =
is
> > > > > > > > > > seems to
> > > > > > contradict
> > > > > > > > > >      everything I read about DOTS. Am I missing =
something
> > here?
> > > > > > > > > >
> > > > > > > > >
> > > > > > > > > [Med] Plain TCP is not allowed. The intent was to be
> > > > > > > > > explicit that there is
> > > > > > > > a
> > > > > > > > > reversal in both TCP and TLS layers, but as you =
rightfully
> > > > > > > > > raised this may
> > > > > > > > be
> > > > > > > > > confusing since, for the DOTS case, it is trivial that =
the
> > > > > > > > > reversal of TLS
> > > > > > > > roles
> > > > > > > > > implies the reversal of TCP ones.
> > > > > > > >
> > > > > > > > RESTCONF call home only reverses the TCP role but not =
the TLS
> > > > > > > > role. In DOTS case, the server has to initiate DTLS =
handshake
> > > > > > > > for UDP. To keep the roles same for TCP,  TLS handshake =
is
> > > > > > > > also initiated
> > > > by
> > > > > the server.
> > > > > > >
> > > > > > > [Med] You missed "for the DOTS case" in my previous reply =
:-)
> > > > > > >
> > > > > > > We do have the following in the draft:
> > > > > > >
> > > > > > >                    DOTS                                =
DOTS
> > > > > > >                   Server                              =
Client
> > > > > > >                     |                                    |
> > > > > > >                     |         1. (D)TLS connection       |
> > > > > > >                     |----------------------------------->|
> > > > > > >                     |         2. Mitigation request      |
> > > > > > >                     |<-----------------------------------|
> > > > > > >                     |                                    |
> > > > > > >
> > > > > > > That can be trivially expanded as follows for the TLS =
case:
> > > > > > >
> > > > > > >                    DOTS                                =
DOTS
> > > > > > >                   Server                              =
Client
> > > > > > >                     |                                    |
> > > > > > >                     |         1.1. TCP                   |
> > > > > > >                     |----------------------------------->|
> > > > > > >                     |         1.2. TLS                   |
> > > > > > >                     |----------------------------------->|
> > > > > > >                     |         2. Mitigation request      |
> > > > > > >                     |<-----------------------------------|
> > > > > > >                     |                                    |
> > > > > >
> > > > > > Okay.
> > > > > >
> > > > > > >
> > > > > > >
> > > > > > > As mentioned earlier, the use of TCP/TLS is OK but it may =
be
> > > > > > > confusing as initially raised by Valery.
> > > > > >
> > > > > > The updated text is not accurate if TCP is not covered, role
> > > > > > reversal at TLS does not mean role reversal at TCP.
> > > > >
> > > > > [Med] The updated text is still fine (ref to Figure 1). We =
don't
> > > > > have any ambiguity in the procedure part with regards to TCP. =
We
> > > > > explicitly say the
> > > > > following:
> > > > >
> > > > >        If TCP is used, the DOTS server begins by initiating a =
TCP
> > > > >        connection to the DOTS client.  The DOTS client MUST =
support
> > > > >        accepting TCP connections on the IANA-assigned port =
number
> > > > >        defined in Section 4.1, but MAY be configured to listen =
to a
> > > > >        different port number.  Using this TCP connection, the =
DOTS
> > > > >        server initiates a TLS connection to the DOTS client.
> > > > >
> > > > > > Similar to (D)TLS, I prefer explicit text to say role =
reversal at
> > TCP.
> > > > >
> > > > > [Med] We already have such text (see the above excerpt).
> > > >
> > > > [TR] Yes, but the updated sentences are incomplete/incorrect at
> > > > various places. I have listed one of the inconsistencies below
> > > >
> > > >    The one and only role reversal that
> > > >    occurs are at the TLS or DTLS layers; that is, the DOTS =
server acts
> > > >    as a DTLS client and the DOTS client acts as a DTLS server or =
the
> > > >    DOTS server acts as a TLS client and the DOTS client acts as =
a TLS
> > > >    server.  The DOTS server initiates TLS handshake or DTLS =
handshake
> to
> > > >    the DOTS client.
> > > >
> > > > The above update means no role reversal at the TCP layer !
> > >
> > > [Med] This text assumes that the TCP is implicitly covered by "TLS =
layer"
> > > (refer again to Figure 1). There is no ambiguity that the reversal =
at the
> > TLS
> > > layer for the DOTS case implies a reversal of the TCP roles, =
because
> > > otherwise the connection cannot be established at the first place =
(due to
> > the
> > > presence of NATs/FWs) !
> >
> > If NAT is not present, connection can be established. FW can be =
configured
> to
> > permit TCP connections from external peer (e.g. port forwarding).
> >
> > >
> > > We can removed "one and only" if this really hurts, though.
> >
> > I propose the following additional change:
> >
> >     The role reversal that
> >     occurs are at the TLS or DTLS layers; that is, the DOTS server =
acts
> >     as a DTLS client and the DOTS client acts as a DTLS server or =
the
> >    DOTS server acts as a TLS client initiating the underlying TCP =
connection
> > and the DOTS client acts as a TLS
> >    server.  The DOTS server initiates TLS handshake or DTLS =
handshake to
> >    the DOTS client.
> >
> > -Tiru
> _______________________________________________
> Dots mailing list
> Dots@ietf.org
> https://www.ietf.org/mailman/listinfo/dots


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From: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>
To: "mohamed.boucadair@orange.com" <mohamed.boucadair@orange.com>
CC: "dots@ietf.org" <dots@ietf.org>
Thread-Topic: [Dots] Adoption call for draft-reddy-dots-home-network-04
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Archived-At: <https://mailarchive.ietf.org/arch/msg/dots/dFL2o7mJ0Wt2l1gygll32JzfBSQ>
Subject: Re: [Dots] Adoption call for draft-reddy-dots-home-network-04
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From: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>
To: Jon Shallow <supjps-ietf@jpshallow.com>, "mohamed.boucadair@orange.com" <mohamed.boucadair@orange.com>, "dots@ietf.org" <dots@ietf.org>
Thread-Topic: [Dots] Adoption call for draft-reddy-dots-home-network-04
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Subject: Re: [Dots] Adoption call for draft-reddy-dots-home-network-04
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From: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>
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Thread-Topic: [Dots] (draft-ietf-dots-signal-filter-control) ACL Stats issue
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Archived-At: <https://mailarchive.ietf.org/arch/msg/dots/M783BNFX_M6gcMuQDKhDOdPc_pI>
Subject: Re: [Dots] (draft-ietf-dots-signal-filter-control) ACL Stats issue
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From: <mohamed.boucadair@orange.com>
To: "dots@ietf.org" <dots@ietf.org>
Thread-Topic: [boucadair/filter-control] Use of acl-* should be acl-name in most cases in the text (#2)
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Date: Thu, 25 Apr 2019 11:14:33 +0000
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Subject: Re: [Dots] [boucadair/filter-control] Use of acl-* should be acl-name in most cases in the text (#2)
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From nobody Thu Apr 25 04:16:40 2019
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From: "Jon Shallow" <supjps-ietf@jpshallow.com>
To: "'Konda, Tirumaleswar Reddy'" <TirumaleswarReddy_Konda@mcafee.com>, <mohamed.boucadair@orange.com>, <dots@ietf.org>
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Date: Thu, 25 Apr 2019 12:16:31 +0100
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Archived-At: <https://mailarchive.ietf.org/arch/msg/dots/cpRCM1QFiapowKQIRoLOatT6SY8>
Subject: Re: [Dots] Adoption call for draft-reddy-dots-home-network-04
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Hi Tiru,

Good point about the DOTS server initial UDP Packet needs to include the =
Client Hello.  However, if it was an empty packet (no data, or some =
other specifically defined data),  the DOTS client could ignore any data =
(as it is listening on the Call Home port) then use the 5 tuple of the =
received packet to send the initial Client Hello to the DOTS server.=20

However, that does raise the question of an attack where someone is =
sending spoofed IP packets to the DOTS client.  But that would also be =
true for a Client Hello packet with a spoofed source IP causing the =
recipient to send out the Server Hello to the spoofed originator.

I will continue to look at how to do the current draft thinking in =
libcoap ....

Regards

Jon

> -----Original Message-----
> From: Dots [mailto: dots-bounces@ietf.org] On Behalf Of Konda, =
Tirumaleswar Reddy
> Sent: 25 April 2019 11:41
> To: Jon Shallow; mohamed.boucadair@orange.com; dots@ietf.org
> Subject: Re: [Dots] Adoption call for draft-reddy-dots-home-network-04
>=20
> Hi Jon,
>=20
> For UDP,  the first packet is the DTLS ClientHello message and it has =
to be
> sent by the DOTS server. The DOTS client cannot send the ClientHello
> Message as the first packet
> because of the reasons listed in =
https://tools.ietf.org/html/rfc8071#section-
> 1.1. We followed the same logic for TLS/TCP.
>=20
> Cheers,
> -Tiru
>=20
> > -----Original Message-----
> > From: Jon Shallow <supjps-ietf@jpshallow.com>
> > Sent: Thursday, April 25, 2019 3:57 PM
> > To: mohamed.boucadair@orange.com; Konda, Tirumaleswar Reddy
> > <TirumaleswarReddy_Konda@McAfee.com>; dots@ietf.org
> > Subject: RE: [Dots] Adoption call for =
draft-reddy-dots-home-network-04
> >
> >
> >
> > Hi Med / Tiru,
> >
> > I am having a hard time working out how to implement this Call Home
> using
> > libcoap.
> >
> > The easiest way in my current thinking is that the role reversal =
should only
> be
> > at the UDP or TCP layer and then (D)TLS is set up / initiated by the =
DOTS
> client
> > to the DOTS server (and is how RFC8071 defines the setup of the =
security
> > layer over TCP).
> >
> > Otherwise, libcoap needs to be taught that (D)TLS set up is in the =
reverse
> > direction to the CoAP transfers which would involve a significant =
re-write
> and
> > a lot of clarity in the code (e.g. am I a server or a client at this =
point of
> working
> > in the network stack?).
> >
> > Just establishing a session 5 tuple in the reverse direction and =
then
> > remembering this only for the UDP/TCP layer is a simple libcoap =
change.
> >
> > So, I would like to see it as (as per RFC8071 Figure 1:)
> >
> >                   DOTS                                   DOTS
> >                   Server                                 Client
> >                     |                                                =
 |
> >                     |         1.  TCP or UDP              |
> >                     |----------------------------------->|
> >                     |         2.  (D)TLS  set up          |
> >                     |<-----------------------------------|
> >                     |         3. Mitigation request   |
> >                     |<-----------------------------------|
> >                     |                                                =
 |
> >
> > Regards
> >
> > Jon
> > > -----Original Message-----
> > > From: Dots [mailto: dots-bounces@ietf.org] On Behalf Of
> > > mohamed.boucadair@orange.com
> > > Sent: 25 April 2019 07:14
> > > To: Konda, Tirumaleswar Reddy
> > > Cc: dots@ietf.org
> > > Subject: Re: [Dots] Adoption call for =
draft-reddy-dots-home-network-04
> > >
> > > Hi Tiru,
> > >
> > > Works for me.
> > >
> > > An updated version with a slightly updated wording is available =
at:
> > > =
https://github.com/boucadair/dots-call-home/blob/master/draft-ietf-dot
> > > s-
> > > signal-call-home-00.txt
> > >
> > > Cheers,
> > > Med
> > >
> > > > -----Message d'origine-----
> > > > De : Konda, Tirumaleswar Reddy
> > > [mailto:TirumaleswarReddy_Konda@McAfee.com]
> > > > Envoy=C3=A9 : mercredi 24 avril 2019 15:26 =C3=80 : BOUCADAIR =
Mohamed
> TGI/OLN;
> > > > Valery Smyslov; dots@ietf.org Cc : dots-chairs@ietf.org;
> > > > kaduk@mit.edu Objet : RE: [Dots] Adoption call for
> > > > draft-reddy-dots-home-network-04
> > > >
> > > > > -----Original Message-----
> > > > > From: mohamed.boucadair@orange.com
> > <mohamed.boucadair@orange.com>
> > > > > Sent: Wednesday, April 24, 2019 6:42 PM
> > > > > To: Konda, Tirumaleswar Reddy
> > > > > <TirumaleswarReddy_Konda@McAfee.com>; Valery Smyslov
> > > > > <valery@smyslov.net>; dots@ietf.org
> > > > > Cc: dots-chairs@ietf.org; kaduk@mit.edu
> > > > > Subject: RE: [Dots] Adoption call for
> > > > > draft-reddy-dots-home-network-04
> > > > >
> > > > > This email originated from outside of the organization. Do not
> > > > > click links
> > > > or
> > > > > open attachments unless you recognize the sender and know the
> > > content is
> > > > > safe.
> > > > >
> > > > > Re-,
> > > > >
> > > > > Please see inline.
> > > > >
> > > > > Cheers,
> > > > > Med
> > > > > > -----Message d'origine-----
> > > > > > De : Konda, Tirumaleswar Reddy
> > > > > > [mailto:TirumaleswarReddy_Konda@McAfee.com]
> > > > > > Envoy=C3=A9 : mercredi 24 avril 2019 14:56 =C3=80 : =
BOUCADAIR Mohamed
> > > > > > TGI/OLN; Valery Smyslov; dots@ietf.org Cc :
> > > > > > dots-chairs@ietf.org; kaduk@mit.edu Objet : RE: [Dots] =
Adoption
> > > > > > call for draft-reddy-dots-home-network-04
> > > > > >
> > > > > > > -----Original Message-----
> > > > > > > From: mohamed.boucadair@orange.com
> > > > > > > <mohamed.boucadair@orange.com>
> > > > > > > Sent: Wednesday, April 24, 2019 4:48 PM
> > > > > > > To: Konda, Tirumaleswar Reddy
> > > > > > > <TirumaleswarReddy_Konda@McAfee.com>; Valery Smyslov
> > > > > > > <valery@smyslov.net>; dots@ietf.org
> > > > > > > Cc: dots-chairs@ietf.org; kaduk@mit.edu
> > > > > > > Subject: RE: [Dots] Adoption call for
> > > > > > > draft-reddy-dots-home-network-04
> > > > > > >
> > > > > > > This email originated from outside of the organization. Do =
not
> > > > > > > click links
> > > > > > or
> > > > > > > open attachments unless you recognize the sender and know =
the
> > > > > > > content is safe.
> > > > > > >
> > > > > > > Re-,
> > > > > > >
> > > > > > > Please see inline.
> > > > > > >
> > > > > > > Cheers,
> > > > > > > Med
> > > > > > >
> > > > > > > > -----Message d'origine-----
> > > > > > > > De : Konda, Tirumaleswar Reddy
> > > > > > > > [mailto:TirumaleswarReddy_Konda@McAfee.com]
> > > > > > > > Envoy=C3=A9 : mercredi 24 avril 2019 13:01 =C3=80 : =
BOUCADAIR Mohamed
> > > > > > > > TGI/OLN; Valery Smyslov; dots@ietf.org Cc :
> > > > > > > > dots-chairs@ietf.org; kaduk@mit.edu Objet : RE: [Dots]
> > > > > > > > Adoption call for draft-reddy-dots-home-network-04
> > > > > > > >
> > > > > > > > > -----Original Message-----
> > > > > > > > > From: mohamed.boucadair@orange.com
> > > > > > > > > <mohamed.boucadair@orange.com>
> > > > > > > > > Sent: Wednesday, April 24, 2019 12:18 PM
> > > > > > > > > To: Konda, Tirumaleswar Reddy
> > > > > > > > > <TirumaleswarReddy_Konda@McAfee.com>; Valery Smyslov
> > > > > > > > > <valery@smyslov.net>; dots@ietf.org
> > > > > > > > > Cc: dots-chairs@ietf.org; kaduk@mit.edu
> > > > > > > > > Subject: RE: [Dots] Adoption call for
> > > > > > > > > draft-reddy-dots-home-network-04
> > > > > > > > >
> > > > > > > > >
> > > > > > > > >
> > > > > > > > > Re-,
> > > > > > > > >
> > > > > > > > > Please see inline.
> > > > > > > > >
> > > > > > > > > Cheers,
> > > > > > > > > Med
> > > > > > > > >
> > > > > > > > > > -----Message d'origine----- De : Konda, Tirumaleswar
> > > > > > > > > > Reddy [mailto:TirumaleswarReddy_Konda@McAfee.com]
> > > > > > > > > > Envoy=C3=A9 : mercredi 24 avril 2019 08:13 =C3=80 : =
BOUCADAIR
> > > > > > > > > > Mohamed TGI/OLN; Valery Smyslov; dots@ietf.org Cc :
> > > > > > > > > > dots-chairs@ietf.org; kaduk@mit.edu Objet : RE: =
[Dots]
> > > > > > > > > > Adoption call for draft-reddy-dots-home-network-04
> > > > > > > > > >
> > > > > > > > > > > -----Original Message-----
> > > > > > > > > > > From: Dots <dots-bounces@ietf.org> On Behalf Of
> > > > > > > > > > > mohamed.boucadair@orange.com
> > > > > > > > > > > Sent: Wednesday, April 24, 2019 11:26 AM
> > > > > > > > > > > To: Valery Smyslov <valery@smyslov.net>; =
dots@ietf.org
> > > > > > > > > > > Cc: dots-chairs@ietf.org; kaduk@mit.edu
> > > > > > > > > > > Subject: Re: [Dots] Adoption call for
> > > > > > > > > > > draft-reddy-dots-home-network-04
> > > > > > > > > > >
> > > > > > > > > > > This email originated from outside of the
> > > > > > > > > > > organization. Do not click links
> > > > > > > > > > or
> > > > > > > > > > > open attachments unless you recognize the sender =
and
> > > > > > > > > > > know the content is safe.
> > > > > > > > > > >
> > > > > > > > > > > Re-,
> > > > > > > > > > >
> > > > > > > > > > > Please see inline.
> > > > > > > > > > >
> > > > > > > > > > > Cheers,
> > > > > > > > > > > Med
> > > > > > > > > > >
> > > > > > > > > > > > -----Message d'origine----- De : Dots
> > > > > > > > > > > > [mailto:dots-bounces@ietf.org] De la part de =
Valery
> > > > > > > > > > > > Smyslov Envoy=C3=A9 : mercredi 24 avril 2019 =
07:02 =C3=80 :
> > > > > > > > > > > > dots@ietf.org
> > > > > > Cc :
> > > > > > > > > > > > dots-chairs@ietf.org; kaduk@mit.edu Objet : Re:
> > > > > > > > > > > > [Dots] Adoption call for
> > > > > > > > > > > > draft-reddy-dots-home-network-04
> > > > > > > > > > > >
> > > > > > > > > > > > Hi,
> > > > > > > > > > > >
> > > > > > > > > > > > we received a lot of replies supporting adoption =
of
> > > > > > > > > > > > the
> > > > > document.
> > > > > > > > > > > > So, the document is adopted. Authors, please
> > > > > > > > > > > > re-submit it as WG
> > > > > > > > draft.
> > > > > > > > > > > >
> > > > > > > > > > > > A couple of comments.
> > > > > > > > > > > > 1. The draft uses few times a keyword "MAY NOT".
> > > > > > > > > > > > This combination is
> > > > > > > > > not
> > > > > > > > > > > >      among the list of RFC requirement keywords =
(it
> > > > > > > > > > > > is not listed
> > > > > > > > neither
> > > > > > > > > > > >      in RFC2119, nor in RFC8174). If the intent =
was
> > > > > > > > > > > > to use RFC
> > > > > > > > > > requirement
> > > > > > > > > > > >      language, then I'd suggest replacing it =
with
> > > > > > > > > > > > one of MUST NOT, SHALL NOT,
> > > > > > > > > > > >      SHOULD NOT. Otherwise please make it =
lowcase.
> > > > > > > > > > > >
> > > > > > > > > > >
> > > > > > > > > > > [Med] Good catch. Fixed.
> > > > > > > > > > >
> > > > > > > > > > > > 2. When describing transport, the draft allows =
both
> > > > > > > > > > > > TLS and
> > > > DTLS.
> > > > > > > > What
> > > > > > > > > > > >      makes me confusing is that the draft =
describes
> > > > > > > > > > > > it several times as "TCP/TLS or DTLS".
> > > > > > > > > > > >      Why TCP is ever mentioned here? We all know
> > > > > > > > > > > > that TLS usually runs
> > > > > > > > > > over
> > > > > > > > > > > >      TCP (however we now have QUICK) and DTLS =
runs
> > > > > > > > > > > > over
> > > UDP.
> > > > > > > > > > > >      The way it is presented in the draft makes =
me
> > > > > > > > > > > > think that
> > > > > > > > probably
> > > > > > > > > > > >      plain TCP is also allowed as a transport, =
but
> > > > > > > > > > > > is seems to
> > > > > > > > contradict
> > > > > > > > > > > >      everything I read about DOTS. Am I missing
> > > > > > > > > > > > something
> > > > here?
> > > > > > > > > > > >
> > > > > > > > > > >
> > > > > > > > > > > [Med] Plain TCP is not allowed. The intent was to =
be
> > > > > > > > > > > explicit that there is
> > > > > > > > > > a
> > > > > > > > > > > reversal in both TCP and TLS layers, but as you
> > > > > > > > > > > rightfully raised this may
> > > > > > > > > > be
> > > > > > > > > > > confusing since, for the DOTS case, it is trivial =
that
> > > > > > > > > > > the reversal of TLS
> > > > > > > > > > roles
> > > > > > > > > > > implies the reversal of TCP ones.
> > > > > > > > > >
> > > > > > > > > > RESTCONF call home only reverses the TCP role but =
not
> > > > > > > > > > the TLS role. In DOTS case, the server has to =
initiate
> > > > > > > > > > DTLS handshake for UDP. To keep the roles same for =
TCP,
> > > > > > > > > > TLS handshake is also initiated
> > > > > > by
> > > > > > > the server.
> > > > > > > > >
> > > > > > > > > [Med] You missed "for the DOTS case" in my previous =
reply
> > > > > > > > > :-)
> > > > > > > > >
> > > > > > > > > We do have the following in the draft:
> > > > > > > > >
> > > > > > > > >                    DOTS                                =
DOTS
> > > > > > > > >                   Server                              =
Client
> > > > > > > > >                     |                                  =
  |
> > > > > > > > >                     |         1. (D)TLS connection     =
  |
> > > > > > > > >                     =
|----------------------------------->|
> > > > > > > > >                     |         2. Mitigation request    =
  |
> > > > > > > > >                     =
|<-----------------------------------|
> > > > > > > > >                     |                                  =
  |
> > > > > > > > >
> > > > > > > > > That can be trivially expanded as follows for the TLS =
case:
> > > > > > > > >
> > > > > > > > >                    DOTS                                =
DOTS
> > > > > > > > >                   Server                              =
Client
> > > > > > > > >                     |                                  =
  |
> > > > > > > > >                     |         1.1. TCP                 =
  |
> > > > > > > > >                     =
|----------------------------------->|
> > > > > > > > >                     |         1.2. TLS                 =
  |
> > > > > > > > >                     =
|----------------------------------->|
> > > > > > > > >                     |         2. Mitigation request    =
  |
> > > > > > > > >                     =
|<-----------------------------------|
> > > > > > > > >                     |                                  =
  |
> > > > > > > >
> > > > > > > > Okay.
> > > > > > > >
> > > > > > > > >
> > > > > > > > >
> > > > > > > > > As mentioned earlier, the use of TCP/TLS is OK but it =
may
> > > > > > > > > be confusing as initially raised by Valery.
> > > > > > > >
> > > > > > > > The updated text is not accurate if TCP is not covered, =
role
> > > > > > > > reversal at TLS does not mean role reversal at TCP.
> > > > > > >
> > > > > > > [Med] The updated text is still fine (ref to Figure 1). We
> > > > > > > don't have any ambiguity in the procedure part with =
regards to
> > > > > > > TCP. We explicitly say the
> > > > > > > following:
> > > > > > >
> > > > > > >        If TCP is used, the DOTS server begins by =
initiating a TCP
> > > > > > >        connection to the DOTS client.  The DOTS client =
MUST
> support
> > > > > > >        accepting TCP connections on the IANA-assigned port =
number
> > > > > > >        defined in Section 4.1, but MAY be configured to =
listen to a
> > > > > > >        different port number.  Using this TCP connection, =
the DOTS
> > > > > > >        server initiates a TLS connection to the DOTS =
client.
> > > > > > >
> > > > > > > > Similar to (D)TLS, I prefer explicit text to say role
> > > > > > > > reversal at
> > > > TCP.
> > > > > > >
> > > > > > > [Med] We already have such text (see the above excerpt).
> > > > > >
> > > > > > [TR] Yes, but the updated sentences are incomplete/incorrect =
at
> > > > > > various places. I have listed one of the inconsistencies =
below
> > > > > >
> > > > > >    The one and only role reversal that
> > > > > >    occurs are at the TLS or DTLS layers; that is, the DOTS =
server acts
> > > > > >    as a DTLS client and the DOTS client acts as a DTLS =
server or the
> > > > > >    DOTS server acts as a TLS client and the DOTS client acts =
as a TLS
> > > > > >    server.  The DOTS server initiates TLS handshake or DTLS
> > > > > > handshake
> > > to
> > > > > >    the DOTS client.
> > > > > >
> > > > > > The above update means no role reversal at the TCP layer !
> > > > >
> > > > > [Med] This text assumes that the TCP is implicitly covered by =
"TLS
> layer"
> > > > > (refer again to Figure 1). There is no ambiguity that the =
reversal
> > > > > at the
> > > > TLS
> > > > > layer for the DOTS case implies a reversal of the TCP roles,
> > > > > because otherwise the connection cannot be established at the
> > > > > first place (due to
> > > > the
> > > > > presence of NATs/FWs) !
> > > >
> > > > If NAT is not present, connection can be established. FW can be
> > > > configured
> > > to
> > > > permit TCP connections from external peer (e.g. port =
forwarding).
> > > >
> > > > >
> > > > > We can removed "one and only" if this really hurts, though.
> > > >
> > > > I propose the following additional change:
> > > >
> > > >     The role reversal that
> > > >     occurs are at the TLS or DTLS layers; that is, the DOTS =
server acts
> > > >     as a DTLS client and the DOTS client acts as a DTLS server =
or the
> > > >    DOTS server acts as a TLS client initiating the underlying =
TCP
> > > > connection and the DOTS client acts as a TLS
> > > >    server.  The DOTS server initiates TLS handshake or DTLS =
handshake
> to
> > > >    the DOTS client.
> > > >
> > > > -Tiru
> > > _______________________________________________
> > > Dots mailing list
> > > Dots@ietf.org
> > > https://www.ietf.org/mailman/listinfo/dots
>=20
> _______________________________________________
> Dots mailing list
> Dots@ietf.org
> https://www.ietf.org/mailman/listinfo/dots


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From: "Jon Shallow" <supjps-ietf@jpshallow.com>
To: <mohamed.boucadair@orange.com>, <dots@ietf.org>
References: <boucadair/filter-control/issues/2@github.com> <787AE7BB302AE849A7480A190F8B93302EA65899@OPEXCAUBMA2.corporate.adroot.infra.ftgroup>
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Subject: Re: [Dots] [boucadair/filter-control] Use of acl-* should be acl-name in most cases in the text (#2)
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Hi Med,

=20

"acl-list and acl-name" works for me, and keeps things clear should any =
new acl-* definition appear in the future.

=20

Regards

=20

Jon

=20

From: Dots [mailto: dots-bounces@ietf.org] On Behalf Of =
mohamed.boucadair@orange.com
Sent: 25 April 2019 12:15
To: dots@ietf.org
Subject: Re: [Dots] [boucadair/filter-control] Use of acl-* should be =
acl-name in most cases in the text (#2)

=20

acl-name cannot be included without including acl-list.

=20

acl-type is optional since acl-name is sufficient to identify an ACL. =
Including it would be valid, but it is completely fine to recommend =
against including acl-type by replacing acl-* with "acl-list and =
acl-name".

=20

Cheers,

Med

=20

De : mrdeep1 [mailto:notifications@github.com]=20
Envoy=C3=A9 : jeudi 25 avril 2019 10:56
=C3=80 : boucadair/filter-control
Cc : Subscribed
Objet : [boucadair/filter-control] Use of acl-* should be acl-name in =
most cases in the text (#2)

=20

acl-name is the only acl-* that a client can send in a request to a =
server - the others are only used for conflict responses.

E.g.
A DOTS client may include acl-* attributes in a mitigation request

should be

A DOTS client may include the acl-name attribute in a mitigation request

=E2=80=94
You are receiving this because you are subscribed to this thread.
Reply to this email directly, view it on GitHub =
<https://github.com/boucadair/filter-control/issues/2> , or mute the =
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</o:shapelayout></xml><![endif]--></head><body lang=3DEN-GB link=3Dblue =
vlink=3Dpurple><div class=3DWordSection1><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Hi Med,<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'=
>&quot;acl-list and acl-name&quot; works for me, and keeps things clear =
should any new acl-* definition appear in the =
future.<o:p></o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'=
><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'=
>Regards<o:p></o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'=
><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'=
>Jon</span><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><div =
style=3D'border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm =
4.0pt'><div><div style=3D'border:none;border-top:solid #B5C4DF =
1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=3DMsoNormal><b><span =
lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span>=
</b><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Dots =
[mailto: dots-bounces@ietf.org] <b>On Behalf Of =
</b>mohamed.boucadair@orange.com<br><b>Sent:</b> 25 April 2019 =
12:15<br><b>To:</b> dots@ietf.org<br><b>Subject:</b> Re: [Dots] =
[boucadair/filter-control] Use of acl-* should be acl-name in most cases =
in the text (#2)<o:p></o:p></span></p></div></div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal><span =
lang=3DEN-US style=3D'font-size:10.0pt;font-family:"Courier =
New";color:black'>acl-name cannot be included without including =
acl-list.<o:p></o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";color:black'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US style=3D'font-size:10.0pt;font-family:"Courier =
New";color:black'>acl-type is optional since acl-name is sufficient to =
identify an ACL. Including it would be valid, but it is completely fine =
to recommend against including acl-type by replacing acl-* with =
&quot;acl-list and acl-name&quot;.<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";color:black'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US style=3D'font-size:10.0pt;font-family:"Courier =
New";color:black'>Cheers,<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Courier =
New";color:black'>Med<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US style=3D'font-size:10.0pt;font-family:"Courier =
New";color:black'><o:p>&nbsp;</o:p></span></p><div =
style=3D'border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm =
4.0pt'><div><div style=3D'border:none;border-top:solid #B5C4DF =
1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=3DMsoNormal><b><span lang=3DFR =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'>De&nbsp;:</s=
pan></b><span lang=3DFR =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'> mrdeep1 =
[mailto:notifications@github.com] <br><b>Envoy=C3=A9&nbsp;:</b> jeudi 25 =
avril 2019 10:56<br><b>=C3=80&nbsp;:</b> =
boucadair/filter-control<br><b>Cc&nbsp;:</b> =
Subscribed<br><b>Objet&nbsp;:</b> [boucadair/filter-control] Use of =
acl-* should be acl-name in most cases in the text =
(#2)<o:p></o:p></span></p></div></div><p class=3DMsoNormal><span =
lang=3DFR><o:p>&nbsp;</o:p></span></p><p><span lang=3DFR>acl-name is the =
only acl-* that a client can send in a request to a server - the others =
are only used for conflict responses.<o:p></o:p></span></p><p><span =
lang=3DFR>E.g.<br>A DOTS client may include acl-* attributes in a =
mitigation request<o:p></o:p></span></p><p><span lang=3DFR>should =
be<o:p></o:p></span></p><p><span lang=3DFR>A DOTS client may include the =
acl-name attribute in a mitigation request<o:p></o:p></span></p><p =
style=3D'-webkit-text-size-adjust:none'><span lang=3DFR =
style=3D'color:#666666'>=E2=80=94<br>You are receiving this because you =
are subscribed to this thread.<br>Reply to this email directly, <a =
href=3D"https://github.com/boucadair/filter-control/issues/2">view it on =
GitHub</a>, or <a =
href=3D"https://github.com/notifications/unsubscribe-auth/ADXR6V36OM77RQS=
D7P6GLQLPSFWYZANCNFSM4HILBZNQ">mute the thread</a>.<img border=3D0 =
width=3D1 height=3D1 id=3D"_x0000_i1025" =
src=3D"https://github.com/notifications/beacon/ADXR6VZBXOZ57W7HF5CKWTTPSF=
WYZANCNFSM4HILBZNQ.gif"><o:p></o:p></span></p></div></div></div></body></=
html>
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From: <mohamed.boucadair@orange.com>
To: Jon Shallow <supjps-ietf@jpshallow.com>, "dots@ietf.org" <dots@ietf.org>
Thread-Topic: [Dots] [boucadair/filter-control] Use of acl-* should be acl-name in most cases in the text (#2)
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Date: Thu, 25 Apr 2019 11:27:02 +0000
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Subject: Re: [Dots] [boucadair/filter-control] Use of acl-* should be acl-name in most cases in the text (#2)
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From: <mohamed.boucadair@orange.com>
To: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>, "Jon Shallow" <supjps-ietf@jpshallow.com>, 'kaname nishizuka' <kaname@nttv6.jp>, "dots@ietf.org" <dots@ietf.org>
Thread-Topic: [Dots] (draft-ietf-dots-signal-filter-control) ACL Stats issue
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Date: Thu, 25 Apr 2019 12:07:18 +0000
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Subject: Re: [Dots] (draft-ietf-dots-signal-filter-control) ACL Stats issue
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From: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>
To: Jon Shallow <supjps-ietf@jpshallow.com>, "mohamed.boucadair@orange.com" <mohamed.boucadair@orange.com>, "dots@ietf.org" <dots@ietf.org>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/dots/giUE8nrhQCekuGpPJtmA2WKcX58>
Subject: Re: [Dots] Adoption call for draft-reddy-dots-home-network-04
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From: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>
To: "mohamed.boucadair@orange.com" <mohamed.boucadair@orange.com>, Jon Shallow <supjps-ietf@jpshallow.com>, 'kaname nishizuka' <kaname@nttv6.jp>, "dots@ietf.org" <dots@ietf.org>
Thread-Topic: [Dots] (draft-ietf-dots-signal-filter-control) ACL Stats issue
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Archived-At: <https://mailarchive.ietf.org/arch/msg/dots/SuRnx4QAmCI6UP_VeWYjzA196SU>
Subject: Re: [Dots] (draft-ietf-dots-signal-filter-control) ACL Stats issue
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From nobody Thu Apr 25 07:17:54 2019
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From: <mohamed.boucadair@orange.com>
To: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>, "Jon Shallow" <supjps-ietf@jpshallow.com>, 'kaname nishizuka' <kaname@nttv6.jp>, "dots@ietf.org" <dots@ietf.org>
Thread-Topic: [Dots] (draft-ietf-dots-signal-filter-control) ACL Stats issue
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Date: Thu, 25 Apr 2019 14:17:46 +0000
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Subject: Re: [Dots] (draft-ietf-dots-signal-filter-control) ACL Stats issue
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From: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>
To: "mohamed.boucadair@orange.com" <mohamed.boucadair@orange.com>, Jon Shallow <supjps-ietf@jpshallow.com>, 'kaname nishizuka' <kaname@nttv6.jp>, "dots@ietf.org" <dots@ietf.org>
Thread-Topic: [Dots] (draft-ietf-dots-signal-filter-control) ACL Stats issue
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Subject: Re: [Dots] (draft-ietf-dots-signal-filter-control) ACL Stats issue
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From: Daniel Migault <daniel.migault@ericsson.com>
Date: Thu, 25 Apr 2019 17:25:12 -0400
Message-ID: <CADZyTkn7gmnOAhwQ0sKY=R9J-icPvqRdEnqaf0KP3sYTw0MsuQ@mail.gmail.com>
To: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@mcafee.com>
Cc: "Panwei (William)" <william.panwei@huawei.com>,  "dots-chairs@ietf.org" <dots-chairs@ietf.org>, Valery Smyslov <valery@smyslov.net>,  "dots@ietf.org" <dots@ietf.org>, "kaduk@mit.edu" <kaduk@mit.edu>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/dots/73FglhWx3xoM-2QrlEwNesL7Pg8>
Subject: Re: [Dots] Adoption call for draft-reddy-dots-home-network-04
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Thanks Tiru,

Thanks for the feedback. Please see my comments/response and clarification.
Apology for being so long to respond.

Yours,
Daniel

On Thu, Apr 18, 2019 at 8:53 AM Konda, Tirumaleswar Reddy <
TirumaleswarReddy_Konda@mcafee.com> wrote:

> Hi Daniel,
>
>
>
> Thanks for the review, Please see inline [TR]
>
>
>
> *From:* Dots <dots-bounces@ietf.org> *On Behalf Of * Daniel Migault
> *Sent:* Monday, April 15, 2019 9:34 PM
> *To:* Panwei (William) <william.panwei@huawei.com>
> *Cc:* dots-chairs@ietf.org; Valery Smyslov <valery@smyslov.net>;
> dots@ietf.org; kaduk@mit.edu
> *Subject:* Re: [Dots] Adoption call for draft-reddy-dots-home-network-04
>
>
>
> *CAUTION*: External email. Do not click links or open attachments unless
> you recognize the sender and know the content is safe.
> ------------------------------
>
> I support the adoption of the draft, please see my comments on the curren=
t
> version. None of them should be considered as preventing the adoption.
>
>
>
> Yours,
>
> Daniel
>
>
>
> Some random comments:
>
>
>
>
>
> Section 1:
>
>
>
> """
>
>    Some of the DDoS attacks like spoofed RST or FIN packets, Slowloris,
>
>    and TLS re-negotiation are difficult to detect on the home network
>
>    devices without adversely affecting its performance.  The reason is
>
>    typically home routers have fast path to boost the throughput.  For
>
>    every new TCP/UDP flow, only the first few packets are punted through
>
>    the slow path.  Hence, it is not possible to detect various DDoS
>
>    attacks in the slow path, since the attack payload is sent to the
>
>    target server after the flow is switched to fast path.  Deep packet
>
>    inspection (DPI) of all the packets of a flow would be able to detect
>
>    some of the attacks.  However, a full-fledged DPI to detect these
>
>    type of DDoS attacks is functionally or operationally not possible
>
>    for all the devices attached to the home network owing to the memory
>
>    and CPU limitations of the home routers.  Further, for certain DDoS
>
>    attacks the ability to distinguish legitimate traffic from attacker
>
>    traffic on a per packet basis is complex.  This complexity originates
>
>    from the fact that the packet itself may look "legitimate" and no
>
>    attack signature can be identified.  The anomaly can be identified
>
>    only after detailed statistical analysis.
>
> """
>
>
>
> I understand, the paragraph below as saying that detection at the ISP is
>
> easier than at the homenet level as the ISP aggregates the traffic. This
>
> is correct and I agree with the text. However, if we are going a bit
>
> further, the detection is even easier to the DDoS target. I believe that
>
> the same mechanism could be deployed between a DDoS target, its Cloud
>
> provider major ISPs up to the origin. The example of the Homenet and the
>
> ISP is only one bound but the mechanism can be generalized and actually
>
> help coordination between independent domains.  I believe the draft can
>
> be placed in a larger perspective.
>
>
>
> [TR] Agreed, it is relatively easy for the DDoS mitigation provider for
> the attack target to detect sophisticated DDoS attacks (especially if the
> attack uses encrypted traffic).
>
>
>
> I will add the following lines:
>
>
>
> BGP defines a mechanism as described in [RFC5575] that can be used to
>
> automate inter-domain coordination of traffic filtering, such as what
>
> is required in order to mitigate DDoS attacks. DDoS mitigation provider
>
> for the attack target can detect sophisticated DDoS attacks
>
> using encrypted attack traffic, and can possibly use BGP flowspec
> [RFC5575] to
>
>   convey the filtering rules to filter block, or rate-limit DDoS attack
> traffic originating
>
>   from the ISP's subscribers to the attack target.
>
>
>
>
>
> Section 3.1 Procedure:
>
>
>
> I am not convinced this is the right approach to switch the roles
>
> between clients and servers. I believe that while the previous dots
>
> signal-channel was foreseeing the relation as asymmetric, we are now
>
> considering DOTS Client and DOTS Server as mostly symmetric. Maybe one
>
> way to see this could be to have a DOTS communication between different
>
> entities, and exchanges can be in both directions. The one initiating
>
> the exchange could be designated as DOTS Initiator, while the receiving
>
> side is the DOTS Responder.
>
>
>
> Here is a more concrete example while Client / Server  might be
>
> confusing. When  a server sends an alert when under attach it is designat=
ed
>
> as the DOTS Client, while the same client specifying these IP addresses
>
> are detected as belonging to an attacker will be the Server.
>
>
>
> It seems also to me that establishment of the (D)TLS channel can be sent
>
> by any other peer, not necessarily the peer sending further
>
> notification/request. Typically the DOTS Client may have set the DOTS
>
> channel protected by (D)TLS, and the DOTS Server may re-use that exact
>
> same channel.
>
>
>
> I am also wondering if the support of the extension is agreed or
>
> announced. If so this would ease the negotiation of which peer is able
>
> to handle the requests and be a "Server".
>
>
>
> [TR] Both draft-reddy-dots-home-network and RFC8071 adopt the same
> approach for managing roles and connections. You may want to look into
> RFC8071.
>
>         CoAP allows asynchronous messages but the request is always sent
> by the CoAP client.
>
>
>
<mglt>ok thanks. and we wants to map the DOTS Client with the CoAP client.
In other words, it is out of scope to have a DOT CLient with a CoAP client
and a CoAP server. When I wrote the comment I had a push request in mind,
and observe does not work ;-)</mglt>


> I believe the clarification and comparison with the
>
> "traditional"/"initial" DOTS use cases is useful and needs to stay for
>
> clarification purpose. However, one should make sure also that such
>
> signalling can also be made with a signal dots signalling established in
>
> the initial use cases. Typically, the DOTS client may have set the DOTS
>
> channel and set a DTLS session which could carry the signalling of the
>
> draft.
>
>
>
> [TR] I don=E2=80=99t get the above comment.
>
<mglt>I suppose my mouse pointer tricked me. The idea I wanted to provide
was that *maybe* it would be good to think as DOTS peers that establish a
channel using DTLS and each peer can be over the same channel act as a
client or server. We would rather talk about initiator and responder. In
other word, to make teh protocol less asymmetric. </mglt>

>
>
> Cheers,
>
> -Tiru
>
>
>
>
>
> On Sun, Apr 14, 2019 at 11:06 PM Panwei (William) <
> william.panwei@huawei.com> wrote:
>
> Hi,
>
> I support adoption of this draft.
>
> Best Regards
> Wei Pan
>
> -----Original Message-----
> From: Dots [mailto:dots-bounces@ietf.org] On Behalf Of Valery Smyslov
> Sent: Monday, April 08, 2019 11:29 PM
> To: dots@ietf.org
> Cc: dots-chairs@ietf.org; kaduk@mit.edu
> Subject: [Dots] Adoption call for draft-reddy-dots-home-network-04
>
> Hi all,
>
> the chairs recently received an adoption request for
> draft-reddy-dots-home-network-04.
>
> This message starts a two-week adoption call for
> draft-reddy-dots-home-network-04.
> The call ends up on Tuesday, April the 23rd.
>
> Please send your opinion regarding adoption of this document to the list
> before this date.
> If you think the draft should be adopted, please indicate whether you're
> willing to review it/to work on it. If you think the draft should not be
> adopted, please explain why.
>
> Regards,
> Frank & Valery.
>
>
> _______________________________________________
> Dots mailing list
> Dots@ietf.org
> https://www.ietf.org/mailman/listinfo/dots
>
> _______________________________________________
> Dots mailing list
> Dots@ietf.org
> https://www.ietf.org/mailman/listinfo/dots
>
> _______________________________________________
> Dots mailing list
> Dots@ietf.org
> https://www.ietf.org/mailman/listinfo/dots
>

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<div dir=3D"ltr"><div>Thanks Tiru,=C2=A0</div><div><br></div><div>Thanks fo=
r the feedback. Please see my comments/response and clarification. Apology =
for being so long to respond.</div><div><br></div>Yours,=C2=A0<div>Daniel</=
div><div><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_att=
r">On Thu, Apr 18, 2019 at 8:53 AM Konda, Tirumaleswar Reddy &lt;<a href=3D=
"mailto:TirumaleswarReddy_Konda@mcafee.com">TirumaleswarReddy_Konda@mcafee.=
com</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"marg=
in:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1e=
x">





<div lang=3D"EN-US">
<div class=3D"gmail-m_-7790649052433407225WordSection1">
<p class=3D"MsoNormal">Hi Daniel, <u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">Thanks for the review, Please see inline [TR]<u></u>=
<u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div style=3D"border-top:none;border-right:none;border-bottom:none;border-l=
eft:1.5pt solid blue;padding:0in 0in 0in 4pt">
<div>
<div style=3D"border-right:none;border-bottom:none;border-left:none;border-=
top:1pt solid rgb(225,225,225);padding:3pt 0in 0in">
<p class=3D"MsoNormal"><b>From:</b> Dots &lt;<a href=3D"mailto:dots-bounces=
@ietf.org" target=3D"_blank">dots-bounces@ietf.org</a>&gt; <b>On Behalf Of =
</b>
Daniel Migault<br>
<b>Sent:</b> Monday, April 15, 2019 9:34 PM<br>
<b>To:</b> Panwei (William) &lt;<a href=3D"mailto:william.panwei@huawei.com=
" target=3D"_blank">william.panwei@huawei.com</a>&gt;<br>
<b>Cc:</b> <a href=3D"mailto:dots-chairs@ietf.org" target=3D"_blank">dots-c=
hairs@ietf.org</a>; Valery Smyslov &lt;<a href=3D"mailto:valery@smyslov.net=
" target=3D"_blank">valery@smyslov.net</a>&gt;; <a href=3D"mailto:dots@ietf=
.org" target=3D"_blank">dots@ietf.org</a>; <a href=3D"mailto:kaduk@mit.edu"=
 target=3D"_blank">kaduk@mit.edu</a><br>
<b>Subject:</b> Re: [Dots] Adoption call for draft-reddy-dots-home-network-=
04<u></u><u></u></p>
</div>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<table class=3D"gmail-m_-7790649052433407225MsoNormalTable" border=3D"1" ce=
llpadding=3D"0" style=3D"background:rgb(243,255,51);border:1.5pt solid rgb(=
155,154,135)">
<tbody>
<tr>
<td style=3D"border:none;padding:0.75pt">
<p><strong><span style=3D"font-size:10pt;font-family:Arial,sans-serif;color=
:rgb(155,139,62)">CAUTION</span></strong><span style=3D"font-size:10pt;font=
-family:Arial,sans-serif;color:rgb(155,139,62)">:</span><span style=3D"font=
-size:10pt;font-family:Arial,sans-serif;color:black">
 External email. Do not click links or open attachments unless you recogniz=
e the sender and know the content is safe.</span><span style=3D"font-size:1=
0pt;font-family:Arial,sans-serif"><u></u><u></u></span></p>
</td>
</tr>
</tbody>
</table>
<div class=3D"MsoNormal" align=3D"center" style=3D"text-align:center">
<hr size=3D"2" width=3D"100%" align=3D"center">
</div>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal">I support the adoption of the draft, please see my c=
omments on the current version. None of them should be considered as preven=
ting the adoption.=C2=A0<u></u><u></u></p>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Yours,=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Daniel<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<div>
<p class=3D"MsoNormal">Some random comments:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Section 1:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&quot;&quot;&quot;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0 =C2=A0Some of the DDoS attacks like spoofed R=
ST or FIN packets, Slowloris,<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0 =C2=A0and TLS re-negotiation are difficult to=
 detect on the home network<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0 =C2=A0devices without adversely affecting its=
 performance.=C2=A0 The reason is<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0 =C2=A0typically home routers have fast path t=
o boost the throughput.=C2=A0 For<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0 =C2=A0every new TCP/UDP flow, only the first =
few packets are punted through<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0 =C2=A0the slow path.=C2=A0 Hence, it is not p=
ossible to detect various DDoS<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0 =C2=A0attacks in the slow path, since the att=
ack payload is sent to the<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0 =C2=A0target server after the flow is switche=
d to fast path.=C2=A0 Deep packet<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0 =C2=A0inspection (DPI) of all the packets of =
a flow would be able to detect<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0 =C2=A0some of the attacks.=C2=A0 However, a f=
ull-fledged DPI to detect these<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0 =C2=A0type of DDoS attacks is functionally or=
 operationally not possible<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0 =C2=A0for all the devices attached to the hom=
e network owing to the memory<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0 =C2=A0and CPU limitations of the home routers=
.=C2=A0 Further, for certain DDoS<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0 =C2=A0attacks the ability to distinguish legi=
timate traffic from attacker<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0 =C2=A0traffic on a per packet basis is comple=
x.=C2=A0 This complexity originates<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0 =C2=A0from the fact that the packet itself ma=
y look &quot;legitimate&quot; and no<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0 =C2=A0attack signature can be identified.=C2=
=A0 The anomaly can be identified<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0 =C2=A0only after detailed statistical analysi=
s.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&quot;&quot;&quot;<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">I understand, the paragraph below as saying that det=
ection at the ISP is<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">easier than at the homenet level as the ISP aggregat=
es the traffic. This<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">is correct and I agree with the text. However, if we=
 are going a bit<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">further, the detection is even easier to the DDoS ta=
rget. I believe that<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">the same mechanism could be deployed between a DDoS =
target, its Cloud<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">provider major ISPs up to the origin. The example of=
 the Homenet and the<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">ISP is only one bound but the mechanism can be gener=
alized and actually<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">help coordination between independent domains.=C2=A0=
 I believe the draft can<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">be placed in a larger perspective.<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">[TR] Agreed, it is relatively easy for the DDoS miti=
gation provider for the attack target to detect sophisticated DDoS attacks =
(especially if the attack uses encrypted traffic).
<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">I will add the following lines:<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:5.25pt">BGP defines a mechanism=
 as described in [RFC5575] that can be used to<u></u><u></u></p>
<p class=3D"MsoNormal" style=3D"margin-left:5.25pt">automate inter-domain c=
oordination of traffic filtering, such as what<u></u><u></u></p>
<p class=3D"MsoNormal" style=3D"margin-left:5.25pt">is required in order to=
 mitigate DDoS attacks. DDoS mitigation provider
<u></u><u></u></p>
<p class=3D"MsoNormal" style=3D"margin-left:5.25pt">for the attack target c=
an detect sophisticated DDoS attacks
<u></u><u></u></p>
<p class=3D"MsoNormal" style=3D"margin-left:5.25pt">using encrypted attack =
traffic, and can possibly use BGP flowspec [RFC5575] to
<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0=C2=A0convey the filtering rules to filter blo=
ck, or rate-limit DDoS attack traffic originating
<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0=C2=A0from the ISP&#39;s subscribers to the at=
tack target.<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Section 3.1 Procedure:<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">I am not convinced this is the right approach to swi=
tch the roles<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">between clients and servers. I believe that while th=
e previous dots<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">signal-channel was foreseeing the relation as asymme=
tric, we are now<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">considering DOTS Client and DOTS Server as mostly sy=
mmetric. Maybe one<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">way to see this could be to have a DOTS communicatio=
n between different<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">entities, and exchanges can be in both directions. T=
he one initiating<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">the exchange could be designated as DOTS Initiator, =
while the receiving<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">side is the DOTS Responder.<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Here is a more concrete example while Client / Serve=
r=C2=A0 might be<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">confusing. When=C2=A0 a server sends an alert when u=
nder attach it is designated<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">as the DOTS Client, while the same client specifying=
 these IP addresses<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">are detected as belonging to an attacker will be the=
 Server.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">It seems also to me that establishment of the (D)TLS=
 channel can be sent<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">by any other peer, not necessarily the peer sending =
further<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">notification/request. Typically the DOTS Client may =
have set the DOTS<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">channel protected by (D)TLS, and the DOTS Server may=
 re-use that exact<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">same channel.<u></u><u></u></p>
</div>
<div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">I am also wondering if the support of the extension =
is agreed or<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">announced. If so this would ease the negotiation of =
which peer is able<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">to handle the requests and be a &quot;Server&quot;.<=
u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">[TR] Both draft-reddy-dots-home-network and RFC8071 =
adopt the same approach for managing roles and connections. You may want to=
 look into RFC8071.
<u></u><u></u></p>
<p class=3D"MsoNormal">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0CoAP=
 allows asynchronous messages but the request is always sent by the CoAP cl=
ient.
<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0</p></div></div></div></div></div></div=
></div></div></div></blockquote><div>&lt;mglt&gt;ok thanks. and we wants to=
 map the DOTS Client with the CoAP client. In other words, it is out of sco=
pe to have a DOT CLient with a CoAP client and a CoAP server. When I wrote =
the comment I had a push request in mind, and observe does not work ;-)&lt;=
/mglt&gt;</div><div>=C2=A0=C2=A0</div><blockquote class=3D"gmail_quote" sty=
le=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);paddi=
ng-left:1ex"><div lang=3D"EN-US"><div class=3D"gmail-m_-7790649052433407225=
WordSection1"><div style=3D"border-top:none;border-right:none;border-bottom=
:none;border-left:1.5pt solid blue;padding:0in 0in 0in 4pt"><div><div><div>=
<div><div><div><p class=3D"MsoNormal"><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">I believe the clarification and comparison with the<=
u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">&quot;traditional&quot;/&quot;initial&quot; DOTS use=
 cases is useful and needs to stay for<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">clarification purpose. However, one should make sure=
 also that such<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">signalling can also be made with a signal dots signa=
lling established in<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">the initial use cases. Typically, the DOTS client ma=
y have set the DOTS<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">channel and set a DTLS session which could carry the=
 signalling of the<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">draft.<u></u><u></u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">[TR] I don=E2=80=99t get the above comment.</p></div=
></div></div></div></div></div></div></div></div></blockquote><div>&lt;mglt=
&gt;I suppose my mouse pointer tricked me. The idea I wanted to provide was=
 that *maybe* it would be good to think as DOTS peers that establish a chan=
nel using DTLS and each peer can be over the same channel act as a client o=
r server. We would rather talk about initiator and responder. In other word=
, to make teh protocol less asymmetric. &lt;/mglt&gt;=C2=A0</div><blockquot=
e class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px s=
olid rgb(204,204,204);padding-left:1ex"><div lang=3D"EN-US"><div class=3D"g=
mail-m_-7790649052433407225WordSection1"><div style=3D"border-top:none;bord=
er-right:none;border-bottom:none;border-left:1.5pt solid blue;padding:0in 0=
in 0in 4pt"><div><div><div><div><div><div><p class=3D"MsoNormal"><u></u><u>=
</u></p>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal">Cheers,<u></u><u></u></p>
<p class=3D"MsoNormal">-Tiru<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
</div>
</div>
</div>
</div>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<div>
<p class=3D"MsoNormal">On Sun, Apr 14, 2019 at 11:06 PM Panwei (William) &l=
t;<a href=3D"mailto:william.panwei@huawei.com" target=3D"_blank">william.pa=
nwei@huawei.com</a>&gt; wrote:<u></u><u></u></p>
</div>
<blockquote style=3D"border-top:none;border-right:none;border-bottom:none;b=
order-left:1pt solid rgb(204,204,204);padding:0in 0in 0in 6pt;margin:5pt 0i=
n 5pt 4.8pt">
<p class=3D"MsoNormal">Hi,<br>
<br>
I support adoption of this draft.<br>
<br>
Best Regards<br>
Wei Pan<br>
<br>
-----Original Message-----<br>
From: Dots [mailto:<a href=3D"mailto:dots-bounces@ietf.org" target=3D"_blan=
k">dots-bounces@ietf.org</a>] On Behalf Of Valery Smyslov<br>
Sent: Monday, April 08, 2019 11:29 PM<br>
To: <a href=3D"mailto:dots@ietf.org" target=3D"_blank">dots@ietf.org</a><br=
>
Cc: <a href=3D"mailto:dots-chairs@ietf.org" target=3D"_blank">dots-chairs@i=
etf.org</a>;
<a href=3D"mailto:kaduk@mit.edu" target=3D"_blank">kaduk@mit.edu</a><br>
Subject: [Dots] Adoption call for draft-reddy-dots-home-network-04<br>
<br>
Hi all,<br>
<br>
the chairs recently received an adoption request for draft-reddy-dots-home-=
network-04.<br>
<br>
This message starts a two-week adoption call for draft-reddy-dots-home-netw=
ork-04.<br>
The call ends up on Tuesday, April the 23rd.<br>
<br>
Please send your opinion regarding adoption of this document to the list be=
fore this date.<br>
If you think the draft should be adopted, please indicate whether you&#39;r=
e willing to review it/to work on it. If you think the draft should not be =
adopted, please explain why.<br>
<br>
Regards,<br>
Frank &amp; Valery.<br>
<br>
<br>
_______________________________________________<br>
Dots mailing list<br>
<a href=3D"mailto:Dots@ietf.org" target=3D"_blank">Dots@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/dots" target=3D"_blank">ht=
tps://www.ietf.org/mailman/listinfo/dots</a><br>
<br>
_______________________________________________<br>
Dots mailing list<br>
<a href=3D"mailto:Dots@ietf.org" target=3D"_blank">Dots@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/dots" target=3D"_blank">ht=
tps://www.ietf.org/mailman/listinfo/dots</a><u></u><u></u></p>
</blockquote>
</div>
</div>
</div>
</div>

_______________________________________________<br>
Dots mailing list<br>
<a href=3D"mailto:Dots@ietf.org" target=3D"_blank">Dots@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/dots" rel=3D"noreferrer" t=
arget=3D"_blank">https://www.ietf.org/mailman/listinfo/dots</a><br>
</blockquote></div></div></div>

--000000000000c4a4fc058761742c--


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From: Daniel Migault <daniel.migault@ericsson.com>
Date: Thu, 25 Apr 2019 21:00:42 -0400
Message-ID: <CADZyTkkCWV5Y8i=R6SEKpAwGCpZDMzFP_GaSa3LtvtPa2mYKaQ@mail.gmail.com>
To: mohamed.boucadair@orange.com
Cc: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@mcafee.com>,  "dots-chairs@ietf.org" <dots-chairs@ietf.org>, Valery Smyslov <valery@smyslov.net>,  "dots@ietf.org" <dots@ietf.org>, "kaduk@mit.edu" <kaduk@mit.edu>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/dots/y0Sg5ovUaYYZXHL-Jf68WG2Chiw>
Subject: Re: [Dots] Adoption call for draft-reddy-dots-home-network-04
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Hi,

Please find my comments inline. I believe my initial comment is addressed.
Igot confused between the DOTS and DTLS Client.

Yours,
Daniel

On Thu, Apr 18, 2019 at 9:13 AM <mohamed.boucadair@orange.com> wrote:

> Hi Tiru, Daniel,
>
>
>
> With regards to:
>
>
>
> =E2=80=9C I believe that
>
> the same mechanism could be deployed between a DDoS target, its Cloud
>
> provider major ISPs up to the origin.=E2=80=9D
>
>
>
> This is not currently doable with DOTS. Some key functional components ar=
e
> needed:
>
> (1) To identify the appropriate ISP which is hosting a DDoS source once a
> DDoS target has detected/reported an attack to its DOTS server/provider.
> The target may not be on the same network as the source.
>
<mglt>I might be wrong, but it seems to me that when the IP address is not
spoof, you can relatively easily go back to the ISP of that IP address. (at
least). Am I missing something ?</mglt>

> (2) That ISP needs to expose a service to receive these notifications.
>
<mglt>Theoretically, you would need an mesh of ISP DOTS communications (for
DTLS). but I imagine we could start with ISP you peer with or have servers
at the RIR level....</mglt>

>
>
> Of course, if the ISP is capable of receiving these notifications, it can
> invoke the procedure in draft-reddy-dots-home-network.
>


>
>
> The scenario mentioned by Daniel is an interesting problem to address=E2=
=80=A6but
> I=E2=80=99m afraid this is out of scope of the current DOTS charter.
>
<mglt>In fact what I really wanted to point out was that at the target
node. a DOT Client sends a message to the DMS. briefly re-reading the draft
I have the impression the DOTS client is on the ISP side. Only TCP/DTLS
client server are exchanged. This seems fine. I believe I misread this the
first time.</mglt>

>
>
> I don=E2=80=99t see how BGP Flowspec solves this.
>
>
>
> Cheers,
>
> Med
>
>
>
> *De :* Dots [mailto:dots-bounces@ietf.org] *De la part de* Konda,
> Tirumaleswar Reddy
> *Envoy=C3=A9 :* jeudi 18 avril 2019 14:52
> *=C3=80 :* Daniel Migault; Panwei (William)
> *Cc :* dots-chairs@ietf.org; Valery Smyslov; dots@ietf.org; kaduk@mit.edu
> *Objet :* Re: [Dots] Adoption call for draft-reddy-dots-home-network-04
>
>
>
> Hi Daniel,
>
>
>
> Thanks for the review, Please see inline [TR]
>
>
>
> *From:* Dots <dots-bounces@ietf.org> *On Behalf Of *Daniel Migault
> *Sent:* Monday, April 15, 2019 9:34 PM
> *To:* Panwei (William) <william.panwei@huawei.com>
> *Cc:* dots-chairs@ietf.org; Valery Smyslov <valery@smyslov.net>;
> dots@ietf.org; kaduk@mit.edu
> *Subject:* Re: [Dots] Adoption call for draft-reddy-dots-home-network-04
>
>
>
> *CAUTION*: External email. Do not click links or open attachments unless
> you recognize the sender and know the content is safe.
> ------------------------------
>
> I support the adoption of the draft, please see my comments on the curren=
t
> version. None of them should be considered as preventing the adoption.
>
>
>
> Yours,
>
> Daniel
>
>
>
> Some random comments:
>
>
>
>
>
> Section 1:
>
>
>
> """
>
>    Some of the DDoS attacks like spoofed RST or FIN packets, Slowloris,
>
>    and TLS re-negotiation are difficult to detect on the home network
>
>    devices without adversely affecting its performance.  The reason is
>
>    typically home routers have fast path to boost the throughput.  For
>
>    every new TCP/UDP flow, only the first few packets are punted through
>
>    the slow path.  Hence, it is not possible to detect various DDoS
>
>    attacks in the slow path, since the attack payload is sent to the
>
>    target server after the flow is switched to fast path.  Deep packet
>
>    inspection (DPI) of all the packets of a flow would be able to detect
>
>    some of the attacks.  However, a full-fledged DPI to detect these
>
>    type of DDoS attacks is functionally or operationally not possible
>
>    for all the devices attached to the home network owing to the memory
>
>    and CPU limitations of the home routers.  Further, for certain DDoS
>
>    attacks the ability to distinguish legitimate traffic from attacker
>
>    traffic on a per packet basis is complex.  This complexity originates
>
>    from the fact that the packet itself may look "legitimate" and no
>
>    attack signature can be identified.  The anomaly can be identified
>
>    only after detailed statistical analysis.
>
> """
>
>
>
> I understand, the paragraph below as saying that detection at the ISP is
>
> easier than at the homenet level as the ISP aggregates the traffic. This
>
> is correct and I agree with the text. However, if we are going a bit
>
> further, the detection is even easier to the DDoS target. I believe that
>
> the same mechanism could be deployed between a DDoS target, its Cloud
>
> provider major ISPs up to the origin. The example of the Homenet and the
>
> ISP is only one bound but the mechanism can be generalized and actually
>
> help coordination between independent domains.  I believe the draft can
>
> be placed in a larger perspective.
>
>
>
> [TR] Agreed, it is relatively easy for the DDoS mitigation provider for
> the attack target to detect sophisticated DDoS attacks (especially if the
> attack uses encrypted traffic).
>
>
>
> I will add the following lines:
>
>
>
> BGP defines a mechanism as described in [RFC5575] that can be used to
>
> automate inter-domain coordination of traffic filtering, such as what
>
> is required in order to mitigate DDoS attacks. DDoS mitigation provider
>
> for the attack target can detect sophisticated DDoS attacks
>
> using encrypted attack traffic, and can possibly use BGP flowspec
> [RFC5575] to
>
>   convey the filtering rules to filter block, or rate-limit DDoS attack
> traffic originating
>
>   from the ISP's subscribers to the attack target.
>
>
>
>
>
> Section 3.1 Procedure:
>
>
>
> I am not convinced this is the right approach to switch the roles
>
> between clients and servers. I believe that while the previous dots
>
> signal-channel was foreseeing the relation as asymmetric, we are now
>
> considering DOTS Client and DOTS Server as mostly symmetric. Maybe one
>
> way to see this could be to have a DOTS communication between different
>
> entities, and exchanges can be in both directions. The one initiating
>
> the exchange could be designated as DOTS Initiator, while the receiving
>
> side is the DOTS Responder.
>
>
>
> Here is a more concrete example while Client / Server  might be
>
> confusing. When  a server sends an alert when under attach it is designat=
ed
>
> as the DOTS Client, while the same client specifying these IP addresses
>
> are detected as belonging to an attacker will be the Server.
>
>
>
> It seems also to me that establishment of the (D)TLS channel can be sent
>
> by any other peer, not necessarily the peer sending further
>
> notification/request. Typically the DOTS Client may have set the DOTS
>
> channel protected by (D)TLS, and the DOTS Server may re-use that exact
>
> same channel.
>
>
>
> I am also wondering if the support of the extension is agreed or
>
> announced. If so this would ease the negotiation of which peer is able
>
> to handle the requests and be a "Server".
>
>
>
> [TR] Both draft-reddy-dots-home-network and RFC8071 adopt the same
> approach for managing roles and connections. You may want to look into
> RFC8071.
>
>         CoAP allows asynchronous messages but the request is always sent
> by the CoAP client.
>
>
>
> I believe the clarification and comparison with the
>
> "traditional"/"initial" DOTS use cases is useful and needs to stay for
>
> clarification purpose. However, one should make sure also that such
>
> signalling can also be made with a signal dots signalling established in
>
> the initial use cases. Typically, the DOTS client may have set the DOTS
>
> channel and set a DTLS session which could carry the signalling of the
>
> draft.
>
>
>
> [TR] I don=E2=80=99t get the above comment.
>
>
>
> Cheers,
>
> -Tiru
>
>
>
>
>
> On Sun, Apr 14, 2019 at 11:06 PM Panwei (William) <
> william.panwei@huawei.com> wrote:
>
> Hi,
>
> I support adoption of this draft.
>
> Best Regards
> Wei Pan
>
> -----Original Message-----
> From: Dots [mailto:dots-bounces@ietf.org] On Behalf Of Valery Smyslov
> Sent: Monday, April 08, 2019 11:29 PM
> To: dots@ietf.org
> Cc: dots-chairs@ietf.org; kaduk@mit.edu
> Subject: [Dots] Adoption call for draft-reddy-dots-home-network-04
>
> Hi all,
>
> the chairs recently received an adoption request for
> draft-reddy-dots-home-network-04.
>
> This message starts a two-week adoption call for
> draft-reddy-dots-home-network-04.
> The call ends up on Tuesday, April the 23rd.
>
> Please send your opinion regarding adoption of this document to the list
> before this date.
> If you think the draft should be adopted, please indicate whether you're
> willing to review it/to work on it. If you think the draft should not be
> adopted, please explain why.
>
> Regards,
> Frank & Valery.
>
>
> _______________________________________________
> Dots mailing list
> Dots@ietf.org
> https://www.ietf.org/mailman/listinfo/dots
>
> _______________________________________________
> Dots mailing list
> Dots@ietf.org
> https://www.ietf.org/mailman/listinfo/dots
>
> _______________________________________________
> Dots mailing list
> Dots@ietf.org
> https://www.ietf.org/mailman/listinfo/dots
>

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<div dir=3D"ltr"><div>Hi,=C2=A0</div><div><br></div><div>Please find my com=
ments inline. I believe my initial comment is addressed.=C2=A0 Igot confuse=
d between the DOTS and DTLS Client.</div><div><br></div><div>Yours,=C2=A0</=
div><div>Daniel=C2=A0=C2=A0</div><br><div class=3D"gmail_quote"><div dir=3D=
"ltr" class=3D"gmail_attr">On Thu, Apr 18, 2019 at 9:13 AM &lt;<a href=3D"m=
ailto:mohamed.boucadair@orange.com">mohamed.boucadair@orange.com</a>&gt; wr=
ote:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px=
 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">





<div lang=3D"FR">
<div class=3D"gmail-m_2047530108490243470WordSection1">
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10pt;font-fa=
mily:&quot;Courier New&quot;;color:black">Hi Tiru, Daniel,
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10pt;font-fa=
mily:&quot;Courier New&quot;;color:black"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10pt;font-fa=
mily:&quot;Courier New&quot;;color:black">With regards to:
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10pt;font-fa=
mily:&quot;Courier New&quot;;color:black"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10pt;font-fa=
mily:&quot;Courier New&quot;;color:black">=E2=80=9C</span><span lang=3D"EN-=
US"> I believe that<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">the same mechanism could be dep=
loyed between a DDoS target, its Cloud<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">provider major ISPs up to the o=
rigin.</span><span lang=3D"EN-US" style=3D"font-size:10pt;font-family:&quot=
;Courier New&quot;;color:black">=E2=80=9D<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10pt;font-fa=
mily:&quot;Courier New&quot;;color:black"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10pt;font-fa=
mily:&quot;Courier New&quot;;color:black">This is not currently doable with=
 DOTS. Some key functional components are needed:<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10pt;font-fa=
mily:&quot;Courier New&quot;;color:black">(1) To identify the appropriate I=
SP which is hosting a DDoS source once a DDoS target has detected/reported =
an attack to its DOTS server/provider. The target
 may not be on the same network as the source.</span></p></div></div></bloc=
kquote><div>&lt;mglt&gt;I might be wrong, but it seems to me that when the =
IP address is not spoof, you can relatively easily go back to the ISP of th=
at IP address. (at least). Am I missing something ?&lt;/mglt&gt;=C2=A0</div=
><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border=
-left:1px solid rgb(204,204,204);padding-left:1ex"><div lang=3D"FR"><div cl=
ass=3D"gmail-m_2047530108490243470WordSection1"><p class=3D"MsoNormal"><spa=
n lang=3D"EN-US" style=3D"font-size:10pt;font-family:&quot;Courier New&quot=
;;color:black"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10pt;font-fa=
mily:&quot;Courier New&quot;;color:black">(2) That ISP needs to expose a se=
rvice to receive these notifications.</span></p></div></div></blockquote><d=
iv>&lt;mglt&gt;Theoretically, you would need an mesh of ISP DOTS communicat=
ions (for DTLS). but I imagine we could start with ISP you peer with or hav=
e servers at the RIR level....&lt;/mglt&gt;</div><blockquote class=3D"gmail=
_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204=
,204);padding-left:1ex"><div lang=3D"FR"><div class=3D"gmail-m_204753010849=
0243470WordSection1"><p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"f=
ont-size:10pt;font-family:&quot;Courier New&quot;;color:black">
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10pt;font-fa=
mily:&quot;Courier New&quot;;color:black"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10pt;font-fa=
mily:&quot;Courier New&quot;;color:black">Of course, if the ISP is capable =
of receiving these notifications, it can invoke the procedure in draft-redd=
y-dots-home-network.</span></p></div></div></blockquote><div>=C2=A0</div><b=
lockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-le=
ft:1px solid rgb(204,204,204);padding-left:1ex"><div lang=3D"FR"><div class=
=3D"gmail-m_2047530108490243470WordSection1"><p class=3D"MsoNormal"><span l=
ang=3D"EN-US" style=3D"font-size:10pt;font-family:&quot;Courier New&quot;;c=
olor:black"><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10pt;font-fa=
mily:&quot;Courier New&quot;;color:black"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10pt;font-fa=
mily:&quot;Courier New&quot;;color:black">The scenario mentioned by Daniel =
is an interesting problem to address=E2=80=A6but I=E2=80=99m afraid this is=
 out of scope of the current DOTS charter.</span></p></div></div></blockquo=
te><div>&lt;mglt&gt;In fact what I really wanted to point out was that at t=
he target node. a DOT Client sends a message to the DMS. briefly re-reading=
 the draft I have the impression the DOTS client is on the ISP side. Only T=
CP/DTLS client server are exchanged. This seems fine. I believe I misread t=
his the first time.&lt;/mglt&gt;=C2=A0=C2=A0</div><blockquote class=3D"gmai=
l_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,20=
4,204);padding-left:1ex"><div lang=3D"FR"><div class=3D"gmail-m_20475301084=
90243470WordSection1"><p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"=
font-size:10pt;font-family:&quot;Courier New&quot;;color:black">
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10pt;font-fa=
mily:&quot;Courier New&quot;;color:black"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10pt;font-fa=
mily:&quot;Courier New&quot;;color:black">I don=E2=80=99t see how BGP Flows=
pec solves this.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10pt;font-fa=
mily:&quot;Courier New&quot;;color:black"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10pt;font-fa=
mily:&quot;Courier New&quot;;color:black">Cheers,<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10pt;font-fa=
mily:&quot;Courier New&quot;;color:black">Med<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10pt;font-fa=
mily:&quot;Courier New&quot;;color:black"><u></u>=C2=A0<u></u></span></p>
<div style=3D"border-top:none;border-right:none;border-bottom:none;border-l=
eft:1.5pt solid blue;padding:0cm 0cm 0cm 4pt">
<div>
<div style=3D"border-right:none;border-bottom:none;border-left:none;border-=
top:1pt solid rgb(181,196,223);padding:3pt 0cm 0cm">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10pt;font-family:Tahoma,=
sans-serif">De=C2=A0:</span></b><span style=3D"font-size:10pt;font-family:T=
ahoma,sans-serif"> Dots [mailto:<a href=3D"mailto:dots-bounces@ietf.org" ta=
rget=3D"_blank">dots-bounces@ietf.org</a>]
<b>De la part de</b> Konda, Tirumaleswar Reddy<br>
<b>Envoy=C3=A9=C2=A0:</b> jeudi 18 avril 2019 14:52<br>
<b>=C3=80=C2=A0:</b> Daniel Migault; Panwei (William)<br>
<b>Cc=C2=A0:</b> <a href=3D"mailto:dots-chairs@ietf.org" target=3D"_blank">=
dots-chairs@ietf.org</a>; Valery Smyslov; <a href=3D"mailto:dots@ietf.org" =
target=3D"_blank">dots@ietf.org</a>; <a href=3D"mailto:kaduk@mit.edu" targe=
t=3D"_blank">kaduk@mit.edu</a><br>
<b>Objet=C2=A0:</b> Re: [Dots] Adoption call for draft-reddy-dots-home-netw=
ork-04<u></u><u></u></span></p>
</div>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Hi Daniel, <u></u><u></u></span=
></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Thanks for the review, Please s=
ee inline [TR]<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><u></u>=C2=A0<u></u></span></p>
<div style=3D"border-top:none;border-right:none;border-bottom:none;border-l=
eft:1.5pt solid blue;padding:0cm 0cm 0cm 4pt">
<div>
<div style=3D"border-right:none;border-bottom:none;border-left:none;border-=
top:1pt solid rgb(225,225,225);padding:3pt 0cm 0cm">
<p class=3D"MsoNormal"><b><span lang=3D"EN-US">From:</span></b><span lang=
=3D"EN-US"> Dots &lt;<a href=3D"mailto:dots-bounces@ietf.org" target=3D"_bl=
ank">dots-bounces@ietf.org</a>&gt;
<b>On Behalf Of </b>Daniel Migault<br>
<b>Sent:</b> Monday, April 15, 2019 9:34 PM<br>
<b>To:</b> Panwei (William) &lt;<a href=3D"mailto:william.panwei@huawei.com=
" target=3D"_blank">william.panwei@huawei.com</a>&gt;<br>
<b>Cc:</b> <a href=3D"mailto:dots-chairs@ietf.org" target=3D"_blank">dots-c=
hairs@ietf.org</a>; Valery Smyslov &lt;<a href=3D"mailto:valery@smyslov.net=
" target=3D"_blank">valery@smyslov.net</a>&gt;; <a href=3D"mailto:dots@ietf=
.org" target=3D"_blank">dots@ietf.org</a>; <a href=3D"mailto:kaduk@mit.edu"=
 target=3D"_blank">kaduk@mit.edu</a><br>
<b>Subject:</b> Re: [Dots] Adoption call for draft-reddy-dots-home-network-=
04<u></u><u></u></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><u></u>=C2=A0<u></u></span></p>
<div>
<table class=3D"gmail-m_2047530108490243470MsoNormalTable" border=3D"1" cel=
lpadding=3D"0" style=3D"background:rgb(243,255,51);border:1.5pt solid rgb(1=
55,154,135)">
<tbody>
<tr>
<td style=3D"border:none;padding:0.75pt">
<p><strong><span style=3D"font-size:10pt;font-family:Arial,sans-serif;color=
:rgb(155,139,62)">CAUTION</span></strong><span style=3D"font-size:10pt;font=
-family:Arial,sans-serif;color:rgb(155,139,62)">:</span><span style=3D"font=
-size:10pt;font-family:Arial,sans-serif;color:black">
 External email. Do not click links or open attachments unless you recogniz=
e the sender and know the content is safe.</span><span style=3D"font-size:1=
0pt;font-family:Arial,sans-serif"><u></u><u></u></span></p>
</td>
</tr>
</tbody>
</table>
<div class=3D"MsoNormal" align=3D"center" style=3D"text-align:center"><span=
 lang=3D"EN-US">
<hr size=3D"2" width=3D"100%" align=3D"center">
</span></div>
</div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">I support the adoption of the d=
raft, please see my comments on the current version. None of them should be=
 considered as preventing the adoption.=C2=A0<u></u><u></u></span></p>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Yours,=C2=A0<u></u><u></u></spa=
n></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Daniel<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Some random comments:<u></u><u>=
</u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Section 1:<u></u><u></u></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">&quot;&quot;&quot;<u></u><u></u=
></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">=C2=A0 =C2=A0Some of the DDoS a=
ttacks like spoofed RST or FIN packets, Slowloris,<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">=C2=A0 =C2=A0and TLS re-negotia=
tion are difficult to detect on the home network<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">=C2=A0 =C2=A0devices without ad=
versely affecting its performance.=C2=A0 The reason is<u></u><u></u></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">=C2=A0 =C2=A0typically home rou=
ters have fast path to boost the throughput.=C2=A0 For<u></u><u></u></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">=C2=A0 =C2=A0every new TCP/UDP =
flow, only the first few packets are punted through<u></u><u></u></span></p=
>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">=C2=A0 =C2=A0the slow path.=C2=
=A0 Hence, it is not possible to detect various DDoS<u></u><u></u></span></=
p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">=C2=A0 =C2=A0attacks in the slo=
w path, since the attack payload is sent to the<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">=C2=A0 =C2=A0target server afte=
r the flow is switched to fast path.=C2=A0 Deep packet<u></u><u></u></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">=C2=A0 =C2=A0inspection (DPI) o=
f all the packets of a flow would be able to detect<u></u><u></u></span></p=
>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">=C2=A0 =C2=A0some of the attack=
s.=C2=A0 However, a full-fledged DPI to detect these<u></u><u></u></span></=
p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">=C2=A0 =C2=A0type of DDoS attac=
ks is functionally or operationally not possible<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">=C2=A0 =C2=A0for all the device=
s attached to the home network owing to the memory<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">=C2=A0 =C2=A0and CPU limitation=
s of the home routers.=C2=A0 Further, for certain DDoS<u></u><u></u></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">=C2=A0 =C2=A0attacks the abilit=
y to distinguish legitimate traffic from attacker<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">=C2=A0 =C2=A0traffic on a per p=
acket basis is complex.=C2=A0 This complexity originates<u></u><u></u></spa=
n></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">=C2=A0 =C2=A0from the fact that=
 the packet itself may look &quot;legitimate&quot; and no<u></u><u></u></sp=
an></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">=C2=A0 =C2=A0attack signature c=
an be identified.=C2=A0 The anomaly can be identified<u></u><u></u></span><=
/p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">=C2=A0 =C2=A0only after detaile=
d statistical analysis.<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">&quot;&quot;&quot;<u></u><u></u=
></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">I understand, the paragraph bel=
ow as saying that detection at the ISP is<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">easier than at the homenet leve=
l as the ISP aggregates the traffic. This<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">is correct and I agree with the=
 text. However, if we are going a bit<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">further, the detection is even =
easier to the DDoS target. I believe that<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">the same mechanism could be dep=
loyed between a DDoS target, its Cloud<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">provider major ISPs up to the o=
rigin. The example of the Homenet and the<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">ISP is only one bound but the m=
echanism can be generalized and actually<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">help coordination between indep=
endent domains.=C2=A0 I believe the draft can<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">be placed in a larger perspecti=
ve.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">[TR] Agreed, it is relatively e=
asy for the DDoS mitigation provider for the attack target to detect sophis=
ticated DDoS attacks (especially if the attack uses encrypted traffic).
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">I will add the following lines:=
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:5.25pt"><span lang=3D"EN-US">BG=
P defines a mechanism as described in [RFC5575] that can be used to<u></u><=
u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:5.25pt"><span lang=3D"EN-US">au=
tomate inter-domain coordination of traffic filtering, such as what<u></u><=
u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:5.25pt"><span lang=3D"EN-US">is=
 required in order to mitigate DDoS attacks. DDoS mitigation provider
<u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:5.25pt"><span lang=3D"EN-US">fo=
r the attack target can detect sophisticated DDoS attacks
<u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:5.25pt"><span lang=3D"EN-US">us=
ing encrypted attack traffic, and can possibly use BGP flowspec [RFC5575] t=
o
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">=C2=A0=C2=A0convey the filterin=
g rules to filter block, or rate-limit DDoS attack traffic originating
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">=C2=A0=C2=A0from the ISP&#39;s =
subscribers to the attack target.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Section 3.1 Procedure:<u></u><u=
></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">I am not convinced this is the =
right approach to switch the roles<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">between clients and servers. I =
believe that while the previous dots<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">signal-channel was foreseeing t=
he relation as asymmetric, we are now<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">considering DOTS Client and DOT=
S Server as mostly symmetric. Maybe one<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">way to see this could be to hav=
e a DOTS communication between different<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">entities, and exchanges can be =
in both directions. The one initiating<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">the exchange could be designate=
d as DOTS Initiator, while the receiving<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">side is the DOTS Responder.<u><=
/u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Here is a more concrete example=
 while Client / Server=C2=A0 might be<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">confusing. When=C2=A0 a server =
sends an alert when under attach it is designated<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">as the DOTS Client, while the s=
ame client specifying these IP addresses<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">are detected as belonging to an=
 attacker will be the Server.<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">It seems also to me that establ=
ishment of the (D)TLS channel can be sent<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">by any other peer, not necessar=
ily the peer sending further<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">notification/request. Typically=
 the DOTS Client may have set the DOTS<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">channel protected by (D)TLS, an=
d the DOTS Server may re-use that exact<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">same channel.<u></u><u></u></sp=
an></p>
</div>
<div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">I am also wondering if the supp=
ort of the extension is agreed or<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">announced. If so this would eas=
e the negotiation of which peer is able<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">to handle the requests and be a=
 &quot;Server&quot;.<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">[TR] Both draft-reddy-dots-home=
-network and RFC8071 adopt the same approach for managing roles and connect=
ions. You may want to look into RFC8071.
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0CoAP allows asynchronous messages but the request is alwa=
ys sent by the CoAP client.
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">I believe the clarification and=
 comparison with the<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">&quot;traditional&quot;/&quot;i=
nitial&quot; DOTS use cases is useful and needs to stay for<u></u><u></u></=
span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">clarification purpose. However,=
 one should make sure also that such<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">signalling can also be made wit=
h a signal dots signalling established in<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">the initial use cases. Typicall=
y, the DOTS client may have set the DOTS<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">channel and set a DTLS session =
which could carry the signalling of the<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">draft.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">[TR] I don=E2=80=99t get the ab=
ove comment.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Cheers,<u></u><u></u></span></p=
>
<p class=3D"MsoNormal"><span lang=3D"EN-US">-Tiru<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><u></u>=C2=A0<u></u></span></p>
</div>
</div>
</div>
</div>
</div>
</div>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><u></u>=C2=A0<u></u></span></p>
<div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">On Sun, Apr 14, 2019 at 11:06 P=
M Panwei (William) &lt;<a href=3D"mailto:william.panwei@huawei.com" target=
=3D"_blank">william.panwei@huawei.com</a>&gt; wrote:<u></u><u></u></span></=
p>
</div>
<blockquote style=3D"border-top:none;border-right:none;border-bottom:none;b=
order-left:1pt solid rgb(204,204,204);padding:0cm 0cm 0cm 6pt;margin:5pt 0c=
m 5pt 4.8pt">
<p class=3D"MsoNormal"><span lang=3D"EN-US">Hi,<br>
<br>
I support adoption of this draft.<br>
<br>
Best Regards<br>
Wei Pan<br>
<br>
-----Original Message-----<br>
From: Dots [mailto:<a href=3D"mailto:dots-bounces@ietf.org" target=3D"_blan=
k">dots-bounces@ietf.org</a>] On Behalf Of Valery Smyslov<br>
Sent: Monday, April 08, 2019 11:29 PM<br>
To: <a href=3D"mailto:dots@ietf.org" target=3D"_blank">dots@ietf.org</a><br=
>
Cc: <a href=3D"mailto:dots-chairs@ietf.org" target=3D"_blank">dots-chairs@i=
etf.org</a>;
<a href=3D"mailto:kaduk@mit.edu" target=3D"_blank">kaduk@mit.edu</a><br>
Subject: [Dots] Adoption call for draft-reddy-dots-home-network-04<br>
<br>
Hi all,<br>
<br>
the chairs recently received an adoption request for draft-reddy-dots-home-=
network-04.<br>
<br>
This message starts a two-week adoption call for draft-reddy-dots-home-netw=
ork-04.<br>
The call ends up on Tuesday, April the 23rd.<br>
<br>
Please send your opinion regarding adoption of this document to the list be=
fore this date.<br>
If you think the draft should be adopted, please indicate whether you&#39;r=
e willing to review it/to work on it. If you think the draft should not be =
adopted, please explain why.<br>
<br>
Regards,<br>
Frank &amp; Valery.<br>
<br>
<br>
_______________________________________________<br>
Dots mailing list<br>
<a href=3D"mailto:Dots@ietf.org" target=3D"_blank">Dots@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/dots" target=3D"_blank">ht=
tps://www.ietf.org/mailman/listinfo/dots</a><br>
<br>
_______________________________________________<br>
Dots mailing list<br>
<a href=3D"mailto:Dots@ietf.org" target=3D"_blank">Dots@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/dots" target=3D"_blank">ht=
tps://www.ietf.org/mailman/listinfo/dots</a><u></u><u></u></span></p>
</blockquote>
</div>
</div>
</div>
</div>
</div>

_______________________________________________<br>
Dots mailing list<br>
<a href=3D"mailto:Dots@ietf.org" target=3D"_blank">Dots@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/dots" rel=3D"noreferrer" t=
arget=3D"_blank">https://www.ietf.org/mailman/listinfo/dots</a><br>
</blockquote></div></div>

--00000000000072b21e0587647767--


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References: <023d01d4ee1f$c2bcb190$483614b0$@smyslov.net> <019001d4fa5a$cf08fb60$6d1af220$@smyslov.net> <787AE7BB302AE849A7480A190F8B93302EA648E7@OPEXCAUBMA2.corporate.adroot.infra.ftgroup> <BYAPR16MB27907ABC5E91DD572EBE7807EA3C0@BYAPR16MB2790.namprd16.prod.outlook.com> <787AE7BB302AE849A7480A190F8B93302EA649DB@OPEXCAUBMA2.corporate.adroot.infra.ftgroup> <BYAPR16MB2790ED963937C8C15B319F63EA3C0@BYAPR16MB2790.namprd16.prod.outlook.com> <787AE7BB302AE849A7480A190F8B93302EA64C46@OPEXCAUBMA2.corporate.adroot.infra.ftgroup>
In-Reply-To: <787AE7BB302AE849A7480A190F8B93302EA64C46@OPEXCAUBMA2.corporate.adroot.infra.ftgroup>
From: Daniel Migault <daniel.migault@ericsson.com>
Date: Thu, 25 Apr 2019 21:03:01 -0400
Message-ID: <CADZyTk=18cxAnWRg_KRUQqbx9c_yf2Tp2Oq3u7Jr4b+J7daN9A@mail.gmail.com>
To: mohamed.boucadair@orange.com
Cc: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@mcafee.com>, Valery Smyslov <valery@smyslov.net>,  "dots@ietf.org" <dots@ietf.org>, "dots-chairs@ietf.org" <dots-chairs@ietf.org>, "kaduk@mit.edu" <kaduk@mit.edu>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/dots/D5SY8jRPozJkYcJ-yb4FzT1Q5i8>
Subject: Re: [Dots] Adoption call for draft-reddy-dots-home-network-04
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Works fine for me. Thanks for addressing this. I believe the text clarified
what confused me in the beginning.
Yours,
Daniel

On Wed, Apr 24, 2019 at 7:18 AM <mohamed.boucadair@orange.com> wrote:

> Re-,
>
> Please see inline.
>
> Cheers,
> Med
>
> > -----Message d'origine-----
> > De : Konda, Tirumaleswar Reddy [mailto:
> TirumaleswarReddy_Konda@McAfee.com]
> > Envoy=C3=A9 : mercredi 24 avril 2019 13:01
> > =C3=80 : BOUCADAIR Mohamed TGI/OLN; Valery Smyslov; dots@ietf.org
> > Cc : dots-chairs@ietf.org; kaduk@mit.edu
> > Objet : RE: [Dots] Adoption call for draft-reddy-dots-home-network-04
> >
> > > -----Original Message-----
> > > From: mohamed.boucadair@orange.com
> > > <mohamed.boucadair@orange.com>
> > > Sent: Wednesday, April 24, 2019 12:18 PM
> > > To: Konda, Tirumaleswar Reddy
> > > <TirumaleswarReddy_Konda@McAfee.com>; Valery Smyslov
> > > <valery@smyslov.net>; dots@ietf.org
> > > Cc: dots-chairs@ietf.org; kaduk@mit.edu
> > > Subject: RE: [Dots] Adoption call for draft-reddy-dots-home-network-0=
4
> > >
> > >
> > >
> > > Re-,
> > >
> > > Please see inline.
> > >
> > > Cheers,
> > > Med
> > >
> > > > -----Message d'origine-----
> > > > De : Konda, Tirumaleswar Reddy
> > > > [mailto:TirumaleswarReddy_Konda@McAfee.com]
> > > > Envoy=C3=A9 : mercredi 24 avril 2019 08:13
> > > > =C3=80 : BOUCADAIR Mohamed TGI/OLN; Valery Smyslov; dots@ietf.org C=
c :
> > > > dots-chairs@ietf.org; kaduk@mit.edu Objet : RE: [Dots] Adoption cal=
l
> > > > for draft-reddy-dots-home-network-04
> > > >
> > > > > -----Original Message-----
> > > > > From: Dots <dots-bounces@ietf.org> On Behalf Of
> > > > > mohamed.boucadair@orange.com
> > > > > Sent: Wednesday, April 24, 2019 11:26 AM
> > > > > To: Valery Smyslov <valery@smyslov.net>; dots@ietf.org
> > > > > Cc: dots-chairs@ietf.org; kaduk@mit.edu
> > > > > Subject: Re: [Dots] Adoption call for
> > > > > draft-reddy-dots-home-network-04
> > > > >
> > > > > This email originated from outside of the organization. Do not
> click
> > > > > links
> > > > or
> > > > > open attachments unless you recognize the sender and know the
> > > > > content is safe.
> > > > >
> > > > > Re-,
> > > > >
> > > > > Please see inline.
> > > > >
> > > > > Cheers,
> > > > > Med
> > > > >
> > > > > > -----Message d'origine-----
> > > > > > De : Dots [mailto:dots-bounces@ietf.org] De la part de Valery
> > > > > > Smyslov Envoy=C3=A9 : mercredi 24 avril 2019 07:02 =C3=80 : dot=
s@ietf.org
> Cc :
> > > > > > dots-chairs@ietf.org; kaduk@mit.edu Objet : Re: [Dots] Adoption
> > > > > > call for draft-reddy-dots-home-network-04
> > > > > >
> > > > > > Hi,
> > > > > >
> > > > > > we received a lot of replies supporting adoption of the documen=
t.
> > > > > > So, the document is adopted. Authors, please re-submit it as WG
> > draft.
> > > > > >
> > > > > > A couple of comments.
> > > > > > 1. The draft uses few times a keyword "MAY NOT". This
> combination is
> > > not
> > > > > >      among the list of RFC requirement keywords (it is not list=
ed
> > neither
> > > > > >      in RFC2119, nor in RFC8174). If the intent was to use RFC
> > > > requirement
> > > > > >      language, then I'd suggest replacing it with one of MUST
> NOT,
> > > > > > SHALL NOT,
> > > > > >      SHOULD NOT. Otherwise please make it lowcase.
> > > > > >
> > > > >
> > > > > [Med] Good catch. Fixed.
> > > > >
> > > > > > 2. When describing transport, the draft allows both TLS and DTL=
S.
> > What
> > > > > >      makes me confusing is that the draft describes it several
> > > > > > times as "TCP/TLS or DTLS".
> > > > > >      Why TCP is ever mentioned here? We all know that TLS usual=
ly
> > > > > > runs
> > > > over
> > > > > >      TCP (however we now have QUICK) and DTLS runs over UDP.
> > > > > >      The way it is presented in the draft makes me think that
> > probably
> > > > > >      plain TCP is also allowed as a transport, but is seems to
> > contradict
> > > > > >      everything I read about DOTS. Am I missing something here?
> > > > > >
> > > > >
> > > > > [Med] Plain TCP is not allowed. The intent was to be explicit tha=
t
> > > > > there is
> > > > a
> > > > > reversal in both TCP and TLS layers, but as you rightfully raised
> > > > > this may
> > > > be
> > > > > confusing since, for the DOTS case, it is trivial that the revers=
al
> > > > > of TLS
> > > > roles
> > > > > implies the reversal of TCP ones.
> > > >
> > > > RESTCONF call home only reverses the TCP role but not the TLS role.
> In
> > > > DOTS case, the server has to initiate DTLS handshake for UDP. To ke=
ep
> > > > the roles same for TCP,  TLS handshake is also initiated by the
> server.
> > >
> > > [Med] You missed "for the DOTS case" in my previous reply :-)
> > >
> > > We do have the following in the draft:
> > >
> > >                    DOTS                                DOTS
> > >                   Server                              Client
> > >                     |                                    |
> > >                     |         1. (D)TLS connection       |
> > >                     |----------------------------------->|
> > >                     |         2. Mitigation request      |
> > >                     |<-----------------------------------|
> > >                     |                                    |
> > >
> > > That can be trivially expanded as follows for the TLS case:
> > >
> > >                    DOTS                                DOTS
> > >                   Server                              Client
> > >                     |                                    |
> > >                     |         1.1. TCP                   |
> > >                     |----------------------------------->|
> > >                     |         1.2. TLS                   |
> > >                     |----------------------------------->|
> > >                     |         2. Mitigation request      |
> > >                     |<-----------------------------------|
> > >                     |                                    |
> >
> > Okay.
> >
> > >
> > >
> > > As mentioned earlier, the use of TCP/TLS is OK but it may be confusin=
g
> as
> > > initially raised by Valery.
> >
> > The updated text is not accurate if TCP is not covered, role reversal a=
t
> TLS
> > does not mean role reversal at TCP.
>
> [Med] The updated text is still fine (ref to Figure 1). We don't have any
> ambiguity in the procedure part with regards to TCP. We explicitly say th=
e
> following:
>
>        If TCP is used, the DOTS server begins by initiating a TCP
>        connection to the DOTS client.  The DOTS client MUST support
>        accepting TCP connections on the IANA-assigned port number
>        defined in Section 4.1, but MAY be configured to listen to a
>        different port number.  Using this TCP connection, the DOTS
>        server initiates a TLS connection to the DOTS client.
>
> > Similar to (D)TLS, I prefer explicit text to say role reversal at TCP.
>
> [Med] We already have such text (see the above excerpt).
>
>  The
> > security considerations section says " DOTS agents MUST authenticate ea=
ch
> > other using (D)TLS before a DOTS
> > signal channel session is considered valid.", so clear text DOTS traffi=
c
> is
> > ruled out.
>
> [Med] Fully agree.
>
> _______________________________________________
> Dots mailing list
> Dots@ietf.org
> https://www.ietf.org/mailman/listinfo/dots
>

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<div dir=3D"ltr">Works fine for me. Thanks for addressing this. I believe t=
he text clarified what confused me in the beginning.<div>Yours,=C2=A0<br>Da=
niel</div></div><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gm=
ail_attr">On Wed, Apr 24, 2019 at 7:18 AM &lt;<a href=3D"mailto:mohamed.bou=
cadair@orange.com">mohamed.boucadair@orange.com</a>&gt; wrote:<br></div><bl=
ockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-lef=
t:1px solid rgb(204,204,204);padding-left:1ex">Re-,<br>
<br>
Please see inline. <br>
<br>
Cheers,<br>
Med<br>
<br>
&gt; -----Message d&#39;origine-----<br>
&gt; De=C2=A0: Konda, Tirumaleswar Reddy [mailto:<a href=3D"mailto:Tirumale=
swarReddy_Konda@McAfee.com" target=3D"_blank">TirumaleswarReddy_Konda@McAfe=
e.com</a>]<br>
&gt; Envoy=C3=A9=C2=A0: mercredi 24 avril 2019 13:01<br>
&gt; =C3=80=C2=A0: BOUCADAIR Mohamed TGI/OLN; Valery Smyslov; <a href=3D"ma=
ilto:dots@ietf.org" target=3D"_blank">dots@ietf.org</a><br>
&gt; Cc=C2=A0: <a href=3D"mailto:dots-chairs@ietf.org" target=3D"_blank">do=
ts-chairs@ietf.org</a>; <a href=3D"mailto:kaduk@mit.edu" target=3D"_blank">=
kaduk@mit.edu</a><br>
&gt; Objet=C2=A0: RE: [Dots] Adoption call for draft-reddy-dots-home-networ=
k-04<br>
&gt; <br>
&gt; &gt; -----Original Message-----<br>
&gt; &gt; From: <a href=3D"mailto:mohamed.boucadair@orange.com" target=3D"_=
blank">mohamed.boucadair@orange.com</a><br>
&gt; &gt; &lt;<a href=3D"mailto:mohamed.boucadair@orange.com" target=3D"_bl=
ank">mohamed.boucadair@orange.com</a>&gt;<br>
&gt; &gt; Sent: Wednesday, April 24, 2019 12:18 PM<br>
&gt; &gt; To: Konda, Tirumaleswar Reddy<br>
&gt; &gt; &lt;TirumaleswarReddy_Konda@McAfee.com&gt;; Valery Smyslov<br>
&gt; &gt; &lt;<a href=3D"mailto:valery@smyslov.net" target=3D"_blank">valer=
y@smyslov.net</a>&gt;; <a href=3D"mailto:dots@ietf.org" target=3D"_blank">d=
ots@ietf.org</a><br>
&gt; &gt; Cc: <a href=3D"mailto:dots-chairs@ietf.org" target=3D"_blank">dot=
s-chairs@ietf.org</a>; <a href=3D"mailto:kaduk@mit.edu" target=3D"_blank">k=
aduk@mit.edu</a><br>
&gt; &gt; Subject: RE: [Dots] Adoption call for draft-reddy-dots-home-netwo=
rk-04<br>
&gt; &gt;<br>
&gt; &gt;<br>
&gt; &gt;<br>
&gt; &gt; Re-,<br>
&gt; &gt;<br>
&gt; &gt; Please see inline.<br>
&gt; &gt;<br>
&gt; &gt; Cheers,<br>
&gt; &gt; Med<br>
&gt; &gt;<br>
&gt; &gt; &gt; -----Message d&#39;origine-----<br>
&gt; &gt; &gt; De=C2=A0: Konda, Tirumaleswar Reddy<br>
&gt; &gt; &gt; [mailto:<a href=3D"mailto:TirumaleswarReddy_Konda@McAfee.com=
" target=3D"_blank">TirumaleswarReddy_Konda@McAfee.com</a>]<br>
&gt; &gt; &gt; Envoy=C3=A9=C2=A0: mercredi 24 avril 2019 08:13<br>
&gt; &gt; &gt; =C3=80=C2=A0: BOUCADAIR Mohamed TGI/OLN; Valery Smyslov; <a =
href=3D"mailto:dots@ietf.org" target=3D"_blank">dots@ietf.org</a> Cc=C2=A0:=
<br>
&gt; &gt; &gt; <a href=3D"mailto:dots-chairs@ietf.org" target=3D"_blank">do=
ts-chairs@ietf.org</a>; <a href=3D"mailto:kaduk@mit.edu" target=3D"_blank">=
kaduk@mit.edu</a> Objet=C2=A0: RE: [Dots] Adoption call<br>
&gt; &gt; &gt; for draft-reddy-dots-home-network-04<br>
&gt; &gt; &gt;<br>
&gt; &gt; &gt; &gt; -----Original Message-----<br>
&gt; &gt; &gt; &gt; From: Dots &lt;<a href=3D"mailto:dots-bounces@ietf.org"=
 target=3D"_blank">dots-bounces@ietf.org</a>&gt; On Behalf Of<br>
&gt; &gt; &gt; &gt; <a href=3D"mailto:mohamed.boucadair@orange.com" target=
=3D"_blank">mohamed.boucadair@orange.com</a><br>
&gt; &gt; &gt; &gt; Sent: Wednesday, April 24, 2019 11:26 AM<br>
&gt; &gt; &gt; &gt; To: Valery Smyslov &lt;<a href=3D"mailto:valery@smyslov=
.net" target=3D"_blank">valery@smyslov.net</a>&gt;; <a href=3D"mailto:dots@=
ietf.org" target=3D"_blank">dots@ietf.org</a><br>
&gt; &gt; &gt; &gt; Cc: <a href=3D"mailto:dots-chairs@ietf.org" target=3D"_=
blank">dots-chairs@ietf.org</a>; <a href=3D"mailto:kaduk@mit.edu" target=3D=
"_blank">kaduk@mit.edu</a><br>
&gt; &gt; &gt; &gt; Subject: Re: [Dots] Adoption call for<br>
&gt; &gt; &gt; &gt; draft-reddy-dots-home-network-04<br>
&gt; &gt; &gt; &gt;<br>
&gt; &gt; &gt; &gt; This email originated from outside of the organization.=
 Do not click<br>
&gt; &gt; &gt; &gt; links<br>
&gt; &gt; &gt; or<br>
&gt; &gt; &gt; &gt; open attachments unless you recognize the sender and kn=
ow the<br>
&gt; &gt; &gt; &gt; content is safe.<br>
&gt; &gt; &gt; &gt;<br>
&gt; &gt; &gt; &gt; Re-,<br>
&gt; &gt; &gt; &gt;<br>
&gt; &gt; &gt; &gt; Please see inline.<br>
&gt; &gt; &gt; &gt;<br>
&gt; &gt; &gt; &gt; Cheers,<br>
&gt; &gt; &gt; &gt; Med<br>
&gt; &gt; &gt; &gt;<br>
&gt; &gt; &gt; &gt; &gt; -----Message d&#39;origine-----<br>
&gt; &gt; &gt; &gt; &gt; De=C2=A0: Dots [mailto:<a href=3D"mailto:dots-boun=
ces@ietf.org" target=3D"_blank">dots-bounces@ietf.org</a>] De la part de Va=
lery<br>
&gt; &gt; &gt; &gt; &gt; Smyslov Envoy=C3=A9=C2=A0: mercredi 24 avril 2019 =
07:02 =C3=80=C2=A0: <a href=3D"mailto:dots@ietf.org" target=3D"_blank">dots=
@ietf.org</a> Cc=C2=A0:<br>
&gt; &gt; &gt; &gt; &gt; <a href=3D"mailto:dots-chairs@ietf.org" target=3D"=
_blank">dots-chairs@ietf.org</a>; <a href=3D"mailto:kaduk@mit.edu" target=
=3D"_blank">kaduk@mit.edu</a> Objet=C2=A0: Re: [Dots] Adoption<br>
&gt; &gt; &gt; &gt; &gt; call for draft-reddy-dots-home-network-04<br>
&gt; &gt; &gt; &gt; &gt;<br>
&gt; &gt; &gt; &gt; &gt; Hi,<br>
&gt; &gt; &gt; &gt; &gt;<br>
&gt; &gt; &gt; &gt; &gt; we received a lot of replies supporting adoption o=
f the document.<br>
&gt; &gt; &gt; &gt; &gt; So, the document is adopted. Authors, please re-su=
bmit it as WG<br>
&gt; draft.<br>
&gt; &gt; &gt; &gt; &gt;<br>
&gt; &gt; &gt; &gt; &gt; A couple of comments.<br>
&gt; &gt; &gt; &gt; &gt; 1. The draft uses few times a keyword &quot;MAY NO=
T&quot;. This combination is<br>
&gt; &gt; not<br>
&gt; &gt; &gt; &gt; &gt;=C2=A0 =C2=A0 =C2=A0 among the list of RFC requirem=
ent keywords (it is not listed<br>
&gt; neither<br>
&gt; &gt; &gt; &gt; &gt;=C2=A0 =C2=A0 =C2=A0 in RFC2119, nor in RFC8174). I=
f the intent was to use RFC<br>
&gt; &gt; &gt; requirement<br>
&gt; &gt; &gt; &gt; &gt;=C2=A0 =C2=A0 =C2=A0 language, then I&#39;d suggest=
 replacing it with one of MUST NOT,<br>
&gt; &gt; &gt; &gt; &gt; SHALL NOT,<br>
&gt; &gt; &gt; &gt; &gt;=C2=A0 =C2=A0 =C2=A0 SHOULD NOT. Otherwise please m=
ake it lowcase.<br>
&gt; &gt; &gt; &gt; &gt;<br>
&gt; &gt; &gt; &gt;<br>
&gt; &gt; &gt; &gt; [Med] Good catch. Fixed.<br>
&gt; &gt; &gt; &gt;<br>
&gt; &gt; &gt; &gt; &gt; 2. When describing transport, the draft allows bot=
h TLS and DTLS.<br>
&gt; What<br>
&gt; &gt; &gt; &gt; &gt;=C2=A0 =C2=A0 =C2=A0 makes me confusing is that the=
 draft describes it several<br>
&gt; &gt; &gt; &gt; &gt; times as &quot;TCP/TLS or DTLS&quot;.<br>
&gt; &gt; &gt; &gt; &gt;=C2=A0 =C2=A0 =C2=A0 Why TCP is ever mentioned here=
? We all know that TLS usually<br>
&gt; &gt; &gt; &gt; &gt; runs<br>
&gt; &gt; &gt; over<br>
&gt; &gt; &gt; &gt; &gt;=C2=A0 =C2=A0 =C2=A0 TCP (however we now have QUICK=
) and DTLS runs over UDP.<br>
&gt; &gt; &gt; &gt; &gt;=C2=A0 =C2=A0 =C2=A0 The way it is presented in the=
 draft makes me think that<br>
&gt; probably<br>
&gt; &gt; &gt; &gt; &gt;=C2=A0 =C2=A0 =C2=A0 plain TCP is also allowed as a=
 transport, but is seems to<br>
&gt; contradict<br>
&gt; &gt; &gt; &gt; &gt;=C2=A0 =C2=A0 =C2=A0 everything I read about DOTS. =
Am I missing something here?<br>
&gt; &gt; &gt; &gt; &gt;<br>
&gt; &gt; &gt; &gt;<br>
&gt; &gt; &gt; &gt; [Med] Plain TCP is not allowed. The intent was to be ex=
plicit that<br>
&gt; &gt; &gt; &gt; there is<br>
&gt; &gt; &gt; a<br>
&gt; &gt; &gt; &gt; reversal in both TCP and TLS layers, but as you rightfu=
lly raised<br>
&gt; &gt; &gt; &gt; this may<br>
&gt; &gt; &gt; be<br>
&gt; &gt; &gt; &gt; confusing since, for the DOTS case, it is trivial that =
the reversal<br>
&gt; &gt; &gt; &gt; of TLS<br>
&gt; &gt; &gt; roles<br>
&gt; &gt; &gt; &gt; implies the reversal of TCP ones.<br>
&gt; &gt; &gt;<br>
&gt; &gt; &gt; RESTCONF call home only reverses the TCP role but not the TL=
S role. In<br>
&gt; &gt; &gt; DOTS case, the server has to initiate DTLS handshake for UDP=
. To keep<br>
&gt; &gt; &gt; the roles same for TCP,=C2=A0 TLS handshake is also initiate=
d by the server.<br>
&gt; &gt;<br>
&gt; &gt; [Med] You missed &quot;for the DOTS case&quot; in my previous rep=
ly :-)<br>
&gt; &gt;<br>
&gt; &gt; We do have the following in the draft:<br>
&gt; &gt;<br>
&gt; &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 DOTS=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 DOTS<br>
&gt; &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0Server=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 Client<br>
&gt; &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0|=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 |<br>
&gt; &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0|=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A01. (D)TLS connection=C2=A0 =C2=
=A0 =C2=A0 =C2=A0|<br>
&gt; &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0|-----------------------------------&gt;|<br>
&gt; &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0|=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A02. Mitigation request=C2=A0 =
=C2=A0 =C2=A0 |<br>
&gt; &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0|&lt;-----------------------------------|<br>
&gt; &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0|=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 |<br>
&gt; &gt;<br>
&gt; &gt; That can be trivially expanded as follows for the TLS case:<br>
&gt; &gt;<br>
&gt; &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 DOTS=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 DOTS<br>
&gt; &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0Server=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 Client<br>
&gt; &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0|=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 |<br>
&gt; &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0|=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A01.1. TCP=C2=A0 =C2=A0 =C2=A0 =
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0|<br>
&gt; &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0|-----------------------------------&gt;|<br>
&gt; &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0|=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A01.2. TLS=C2=A0 =C2=A0 =C2=A0 =
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0|<br>
&gt; &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0|-----------------------------------&gt;|<br>
&gt; &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0|=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A02. Mitigation request=C2=A0 =
=C2=A0 =C2=A0 |<br>
&gt; &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0|&lt;-----------------------------------|<br>
&gt; &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0|=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 |<br>
&gt; <br>
&gt; Okay.<br>
&gt; <br>
&gt; &gt;<br>
&gt; &gt;<br>
&gt; &gt; As mentioned earlier, the use of TCP/TLS is OK but it may be conf=
using as<br>
&gt; &gt; initially raised by Valery.<br>
&gt; <br>
&gt; The updated text is not accurate if TCP is not covered, role reversal =
at TLS<br>
&gt; does not mean role reversal at TCP.<br>
<br>
[Med] The updated text is still fine (ref to Figure 1). We don&#39;t have a=
ny ambiguity in the procedure part with regards to TCP. We explicitly say t=
he following:=C2=A0 <br>
<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0If TCP is used, the DOTS server begins by initia=
ting a TCP<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0connection to the DOTS client.=C2=A0 The DOTS cl=
ient MUST support<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0accepting TCP connections on the IANA-assigned p=
ort number<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0defined in Section 4.1, but MAY be configured to=
 listen to a<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0different port number.=C2=A0 Using this TCP conn=
ection, the DOTS<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0server initiates a TLS connection to the DOTS cl=
ient.<br>
<br>
&gt; Similar to (D)TLS, I prefer explicit text to say role reversal at TCP.=
<br>
<br>
[Med] We already have such text (see the above excerpt). <br>
<br>
=C2=A0The<br>
&gt; security considerations section says &quot; DOTS agents MUST authentic=
ate each<br>
&gt; other using (D)TLS before a DOTS<br>
&gt; signal channel session is considered valid.&quot;, so clear text DOTS =
traffic is<br>
&gt; ruled out.<br>
<br>
[Med] Fully agree. <br>
<br>
_______________________________________________<br>
Dots mailing list<br>
<a href=3D"mailto:Dots@ietf.org" target=3D"_blank">Dots@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/dots" rel=3D"noreferrer" t=
arget=3D"_blank">https://www.ietf.org/mailman/listinfo/dots</a><br>
</blockquote></div>

--000000000000c24b020587647f7c--


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Thread-Topic: [Dots] (draft-ietf-dots-signal-filter-control) ACL Stats issue
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From nobody Thu Apr 25 23:16:11 2019
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From: <mohamed.boucadair@orange.com>
To: Daniel Migault <daniel.migault@ericsson.com>
CC: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@mcafee.com>, "dots-chairs@ietf.org" <dots-chairs@ietf.org>, Valery Smyslov <valery@smyslov.net>, "dots@ietf.org" <dots@ietf.org>, "kaduk@mit.edu" <kaduk@mit.edu>
Thread-Topic: [Dots] Adoption call for draft-reddy-dots-home-network-04
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Date: Fri, 26 Apr 2019 06:16:03 +0000
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From: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>
To: "mohamed.boucadair@orange.com" <mohamed.boucadair@orange.com>, Jon Shallow <supjps-ietf@jpshallow.com>, 'kaname nishizuka' <kaname@nttv6.jp>, "dots@ietf.org" <dots@ietf.org>
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Subject: Re: [Dots] (draft-ietf-dots-signal-filter-control) ACL Stats issue
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From: Daniel Migault <daniel.migault@ericsson.com>
Date: Fri, 26 Apr 2019 08:25:17 -0400
Message-ID: <CADZyTkkphbAiQuX330FZZxZQPzgEptuy5BQOAa-vtK6X5MrW9A@mail.gmail.com>
To: mohamed.boucadair@orange.com
Cc: "dots-chairs@ietf.org" <dots-chairs@ietf.org>,  "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@mcafee.com>, Valery Smyslov <valery@smyslov.net>,  "dots@ietf.org" <dots@ietf.org>, "kaduk@mit.edu" <kaduk@mit.edu>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/dots/emI7dSTEkiW-RkyZMRvOqTs3bCA>
Subject: Re: [Dots] Adoption call for draft-reddy-dots-home-network-04
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Thanks for the response.
Yours,
Daniel

On Fri, Apr 26, 2019 at 2:16 AM <mohamed.boucadair@orange.com> wrote:

> Hi Daniel,
>
>
>
> Please see inline.
>
>
>
> Cheers,
>
> Med
>
>
>
> *De :* Daniel Migault [mailto:daniel.migault@ericsson.com]
> *Envoy=C3=A9 :* vendredi 26 avril 2019 03:01
> *=C3=80 :* BOUCADAIR Mohamed TGI/OLN
> *Cc :* Konda, Tirumaleswar Reddy; dots-chairs@ietf.org; Valery Smyslov;
> dots@ietf.org; kaduk@mit.edu
> *Objet :* Re: [Dots] Adoption call for draft-reddy-dots-home-network-04
>
>
>
> Hi,
>
>
>
> Please find my comments inline. I believe my initial comment is
> addressed.  Igot confused between the DOTS and DTLS Client.
>
>
>
> Yours,
>
> Daniel
>
>
>
> On Thu, Apr 18, 2019 at 9:13 AM <mohamed.boucadair@orange.com> wrote:
>
> Hi Tiru, Daniel,
>
>
>
> With regards to:
>
>
>
> =E2=80=9C I believe that
>
> the same mechanism could be deployed between a DDoS target, its Cloud
>
> provider major ISPs up to the origin.=E2=80=9D
>
>
>
> This is not currently doable with DOTS. Some key functional components ar=
e
> needed:
>
> (1) To identify the appropriate ISP which is hosting a DDoS source once a
> DDoS target has detected/reported an attack to its DOTS server/provider.
> The target may not be on the same network as the source.
>
> <mglt>I might be wrong, but it seems to me that when the IP address is no=
t
> spoof, you can relatively easily go back to the ISP of that IP address. (=
at
> least). Am I missing something ?</mglt>
>
> [Med] That=E2=80=99s a good starting point (assuming workarounds for some=
 issues
> such as: registries are not always up to date due to secondary market and
> so on.)
>
>
>
> (2) That ISP needs to expose a service to receive these notifications.
>
> <mglt>Theoretically, you would need an mesh of ISP DOTS communications
> (for DTLS). but I imagine we could start with ISP you peer with or have
> servers at the RIR level....</mglt>
>
> [Med] That=E2=80=99s an option. A solution is missing in that space, IMO.=
 Such
> solution would also be used, for example, by IP reputation systems which
> currently add IP addresses to blacklists without even informing the ISPs.
> If that information is made available using some dynamic means, appropria=
te
> actions can be enforced by ISPs rather than assigning a =E2=80=9Cpolluted=
=E2=80=9D IP
> address to customers who will experience a bad quality because of
> restrictions induced by the reputation of the assigned IP address. We can
> discuss this offline as this is not specific to DOTS.
>
>
>
> Of course, if the ISP is capable of receiving these notifications, it can
> invoke the procedure in draft-reddy-dots-home-network.
>
>
> _______________________________________________
> Dots mailing list
> Dots@ietf.org
> https://www.ietf.org/mailman/listinfo/dots
>

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<div dir=3D"ltr">Thanks for the response.=C2=A0<div>Yours,=C2=A0<br>Daniel<=
/div></div><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_a=
ttr">On Fri, Apr 26, 2019 at 2:16 AM &lt;<a href=3D"mailto:mohamed.boucadai=
r@orange.com">mohamed.boucadair@orange.com</a>&gt; wrote:<br></div><blockqu=
ote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px=
 solid rgb(204,204,204);padding-left:1ex">





<div lang=3D"FR">
<div class=3D"gmail-m_-8345861154135978703WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:&quot;Cour=
ier New&quot;;color:black">Hi Daniel,
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:&quot;Cour=
ier New&quot;;color:black"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:&quot;Cour=
ier New&quot;;color:black">Please see inline.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:&quot;Cour=
ier New&quot;;color:black"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:&quot;Cour=
ier New&quot;;color:black">Cheers,<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:&quot;Cour=
ier New&quot;;color:black">Med<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:&quot;Cour=
ier New&quot;;color:black"><u></u>=C2=A0<u></u></span></p>
<div style=3D"border-top:none;border-right:none;border-bottom:none;border-l=
eft:1.5pt solid blue;padding:0cm 0cm 0cm 4pt">
<div>
<div style=3D"border-right:none;border-bottom:none;border-left:none;border-=
top:1pt solid rgb(181,196,223);padding:3pt 0cm 0cm">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10pt;font-family:Tahoma,=
sans-serif">De=C2=A0:</span></b><span style=3D"font-size:10pt;font-family:T=
ahoma,sans-serif"> Daniel Migault [mailto:<a href=3D"mailto:daniel.migault@=
ericsson.com" target=3D"_blank">daniel.migault@ericsson.com</a>]
<br>
<b>Envoy=C3=A9=C2=A0:</b> vendredi 26 avril 2019 03:01<br>
<b>=C3=80=C2=A0:</b> BOUCADAIR Mohamed TGI/OLN<br>
<b>Cc=C2=A0:</b> Konda, Tirumaleswar Reddy; <a href=3D"mailto:dots-chairs@i=
etf.org" target=3D"_blank">dots-chairs@ietf.org</a>; Valery Smyslov; <a hre=
f=3D"mailto:dots@ietf.org" target=3D"_blank">dots@ietf.org</a>; <a href=3D"=
mailto:kaduk@mit.edu" target=3D"_blank">kaduk@mit.edu</a><br>
<b>Objet=C2=A0:</b> Re: [Dots] Adoption call for draft-reddy-dots-home-netw=
ork-04<u></u><u></u></span></p>
</div>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<div>
<p class=3D"MsoNormal">Hi,=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Please find my comments inline. I believe my initial=
 comment is addressed.=C2=A0 Igot confused between the DOTS and DTLS Client=
.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Yours,=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Daniel=C2=A0=C2=A0<u></u><u></u></p>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<div>
<p class=3D"MsoNormal">On Thu, Apr 18, 2019 at 9:13 AM &lt;<a href=3D"mailt=
o:mohamed.boucadair@orange.com" target=3D"_blank">mohamed.boucadair@orange.=
com</a>&gt; wrote:<u></u><u></u></p>
</div>
<blockquote style=3D"border-top:none;border-right:none;border-bottom:none;b=
order-left:1pt solid rgb(204,204,204);padding:0cm 0cm 0cm 6pt;margin-left:4=
.8pt;margin-right:0cm">
<div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10pt;font-fa=
mily:&quot;Courier New&quot;;color:black">Hi Tiru, Daniel,
</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10pt;font-fa=
mily:&quot;Courier New&quot;;color:black">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10pt;font-fa=
mily:&quot;Courier New&quot;;color:black">With regards to:
</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10pt;font-fa=
mily:&quot;Courier New&quot;;color:black">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10pt;font-fa=
mily:&quot;Courier New&quot;;color:black">=E2=80=9C</span><span lang=3D"EN-=
US"> I believe that</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">the same mechanism could be dep=
loyed between a DDoS target, its Cloud</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">provider major ISPs up to the o=
rigin.</span><span lang=3D"EN-US" style=3D"font-size:10pt;font-family:&quot=
;Courier New&quot;;color:black">=E2=80=9D</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10pt;font-fa=
mily:&quot;Courier New&quot;;color:black">=C2=A0</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10pt;font-fa=
mily:&quot;Courier New&quot;;color:black">This is not currently doable with=
 DOTS. Some key functional components are needed:</span><u></u><u></u></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10pt;font-fa=
mily:&quot;Courier New&quot;;color:black">(1) To identify the appropriate I=
SP which is hosting a DDoS source once a DDoS target has detected/reported
 an attack to its DOTS server/provider. The target may not be on the same n=
etwork as the source.</span><u></u><u></u></p>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;I might be wrong, but it seems to me tha=
t when the IP address is not spoof, you can relatively easily go back to th=
e ISP of that IP address. (at least). Am I missing something ?&lt;/mglt&gt;=
=C2=A0<u></u><u></u></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10pt;font-fa=
mily:&quot;Courier New&quot;;color:black">[Med] That=E2=80=99s a good start=
ing point (assuming workarounds for some issues such as: registries are not=
 always up to date due to secondary market and so on.)<u></u><u></u></span>=
</p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10pt;font-fa=
mily:&quot;Courier New&quot;;color:black"><u></u>=C2=A0<u></u></span></p>
</div>
<blockquote style=3D"border-top:none;border-right:none;border-bottom:none;b=
order-left:1pt solid rgb(204,204,204);padding:0cm 0cm 0cm 6pt;margin-left:4=
.8pt;margin-right:0cm">
<div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10pt;font-fa=
mily:&quot;Courier New&quot;;color:black">(2) That ISP needs to expose a se=
rvice to receive these notifications.</span><u></u><u></u></p>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal">&lt;mglt&gt;Theoretically, you would need an mesh of=
 ISP DOTS communications (for DTLS). but I imagine we could start with ISP =
you peer with or have servers at the RIR level....&lt;/mglt&gt;<u></u><u></=
u></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10pt;font-fa=
mily:&quot;Courier New&quot;;color:black">[Med] That=E2=80=99s an option. A=
 solution is missing in that space, IMO. Such solution would also be used, =
for example, by IP reputation systems which currently
 add IP addresses to blacklists without even informing the ISPs. If that in=
formation is made available using some dynamic means, appropriate actions c=
an be enforced by ISPs rather than assigning a =E2=80=9Cpolluted=E2=80=9D I=
P address to customers who will experience a bad
 quality because of restrictions induced by the reputation of the assigned =
IP address. We can discuss this offline as this is not specific to DOTS.
<u></u><u></u></span></p>
</div>
<blockquote style=3D"border-top:none;border-right:none;border-bottom:none;b=
order-left:1pt solid rgb(204,204,204);padding:0cm 0cm 0cm 6pt;margin-left:4=
.8pt;margin-right:0cm">
<div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10pt;font-fa=
mily:&quot;Courier New&quot;;color:black">=C2=A0</span><span lang=3D"EN-US"=
><u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10pt;font-fa=
mily:&quot;Courier New&quot;;color:black">Of course, if the ISP is capable =
of receiving these notifications, it can invoke the procedure
 in draft-reddy-dots-home-network.</span><span lang=3D"EN-US"><u></u><u></u=
></span></p>
</div>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US">=C2=A0<u></u><u></u></span></p>
</div>
</div>
</div>
</div>
</div>
</div>

_______________________________________________<br>
Dots mailing list<br>
<a href=3D"mailto:Dots@ietf.org" target=3D"_blank">Dots@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/dots" rel=3D"noreferrer" t=
arget=3D"_blank">https://www.ietf.org/mailman/listinfo/dots</a><br>
</blockquote></div>

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Subject: Re: [Dots] (draft-ietf-dots-signal-filter-control) ACL Stats issue
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From: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>
To: "mohamed.boucadair@orange.com" <mohamed.boucadair@orange.com>, Jon Shallow <supjps-ietf@jpshallow.com>, 'kaname nishizuka' <kaname@nttv6.jp>, "dots@ietf.org" <dots@ietf.org>
Thread-Topic: [Dots] (draft-ietf-dots-signal-filter-control) ACL Stats issue
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Subject: Re: [Dots] (draft-ietf-dots-signal-filter-control) ACL Stats issue
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From nobody Fri Apr 26 07:09:10 2019
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Subject: [Dots] I-D Action: draft-ietf-dots-signal-call-home-01.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the DDoS Open Threat Signaling WG of the IETF.

        Title           : Distributed Denial-of-Service Open Threat Signaling (DOTS) Signal Channel Call Home
        Authors         : Tirumaleswar Reddy
                          Mohamed Boucadair
                          Jon Shallow
	Filename        : draft-ietf-dots-signal-call-home-01.txt
	Pages           : 22
	Date            : 2019-04-26

Abstract:
   This document specifies the DOTS signal channel Call Home service,
   which enables a DOTS server to initiate a secure connection to a DOTS
   client, and to receive the attack traffic information from the DOTS
   client.  The DOTS server in turn uses the attack traffic information
   to identify the compromised devices launching the outgoing DDoS
   attack and takes appropriate mitigation action(s).

   The Call Home service is not specific to the home networks; the
   solution targets any deployment which requires to block DDoS attack
   traffic closer to the source(s) of a DDoS attack.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-dots-signal-call-home/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-dots-signal-call-home-01
https://datatracker.ietf.org/doc/html/draft-ietf-dots-signal-call-home-01

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-dots-signal-call-home-01


Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/


From nobody Fri Apr 26 07:14:24 2019
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From: <mohamed.boucadair@orange.com>
To: "dots@ietf.org" <dots@ietf.org>
Thread-Topic: [Dots] I-D Action: draft-ietf-dots-signal-call-home-01.txt
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All,

The new version implements the following changes:=20

* Integrate the comment from Daniel about the applicability of the proposal=
.=20
* Fix two minor issues with the YANG module.
* Add a reference architecture.=20
* Add text toe describe the behavior with regards to the source address val=
idation and clarify how target-prefix is validated.
* Some edits and fix nits.=20

Please review and share your comments. Feel free to open issues at https://=
github.com/boucadair/dots-call-home.=20

Cheers,
Med

> -----Message d'origine-----
> De=A0: Dots [mailto:dots-bounces@ietf.org] De la part de internet-
> drafts@ietf.org
> Envoy=E9=A0: vendredi 26 avril 2019 16:09
> =C0=A0: i-d-announce@ietf.org
> Cc=A0: dots@ietf.org
> Objet=A0: [Dots] I-D Action: draft-ietf-dots-signal-call-home-01.txt
>=20
>=20
> A New Internet-Draft is available from the on-line Internet-Drafts
> directories.
> This draft is a work item of the DDoS Open Threat Signaling WG of the IET=
F.
>=20
>         Title           : Distributed Denial-of-Service Open Threat Signa=
ling
> (DOTS) Signal Channel Call Home
>         Authors         : Tirumaleswar Reddy
>                           Mohamed Boucadair
>                           Jon Shallow
> 	Filename        : draft-ietf-dots-signal-call-home-01.txt
> 	Pages           : 22
> 	Date            : 2019-04-26
>=20
> Abstract:
>    This document specifies the DOTS signal channel Call Home service,
>    which enables a DOTS server to initiate a secure connection to a DOTS
>    client, and to receive the attack traffic information from the DOTS
>    client.  The DOTS server in turn uses the attack traffic information
>    to identify the compromised devices launching the outgoing DDoS
>    attack and takes appropriate mitigation action(s).
>=20
>    The Call Home service is not specific to the home networks; the
>    solution targets any deployment which requires to block DDoS attack
>    traffic closer to the source(s) of a DDoS attack.
>=20
>=20
> The IETF datatracker status page for this draft is:
> https://datatracker.ietf.org/doc/draft-ietf-dots-signal-call-home/
>=20
> There are also htmlized versions available at:
> https://tools.ietf.org/html/draft-ietf-dots-signal-call-home-01
> https://datatracker.ietf.org/doc/html/draft-ietf-dots-signal-call-home-01
>=20
> A diff from the previous version is available at:
> https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-dots-signal-call-home-01
>=20
>=20
> Please note that it may take a couple of minutes from the time of submiss=
ion
> until the htmlized version and diff are available at tools.ietf.org.
>=20
> Internet-Drafts are also available by anonymous FTP at:
> ftp://ftp.ietf.org/internet-drafts/
>=20
> _______________________________________________
> Dots mailing list
> Dots@ietf.org
> https://www.ietf.org/mailman/listinfo/dots


From nobody Sun Apr 28 23:36:49 2019
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From: <mohamed.boucadair@orange.com>
To: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>, "Jon Shallow" <supjps-ietf@jpshallow.com>, 'kaname nishizuka' <kaname@nttv6.jp>, "dots@ietf.org" <dots@ietf.org>
Thread-Topic: [Dots] (draft-ietf-dots-signal-filter-control) ACL Stats issue
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Subject: Re: [Dots] (draft-ietf-dots-signal-filter-control) ACL Stats issue
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From: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>
To: "mohamed.boucadair@orange.com" <mohamed.boucadair@orange.com>, Jon Shallow <supjps-ietf@jpshallow.com>, 'kaname nishizuka' <kaname@nttv6.jp>, "dots@ietf.org" <dots@ietf.org>
Thread-Topic: [Dots] (draft-ietf-dots-signal-filter-control) ACL Stats issue
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Archived-At: <https://mailarchive.ietf.org/arch/msg/dots/gn7RawiYZmLFR0YP7VJv8ZQu8R0>
Subject: Re: [Dots] (draft-ietf-dots-signal-filter-control) ACL Stats issue
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From: <mohamed.boucadair@orange.com>
To: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>, "Jon Shallow" <supjps-ietf@jpshallow.com>, 'kaname nishizuka' <kaname@nttv6.jp>, "dots@ietf.org" <dots@ietf.org>
Thread-Topic: [Dots] (draft-ietf-dots-signal-filter-control) ACL Stats issue
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Date: Mon, 29 Apr 2019 09:16:12 +0000
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Subject: Re: [Dots] (draft-ietf-dots-signal-filter-control) ACL Stats issue
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From: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>
To: "mohamed.boucadair@orange.com" <mohamed.boucadair@orange.com>, Jon Shallow <supjps-ietf@jpshallow.com>, 'kaname nishizuka' <kaname@nttv6.jp>, "dots@ietf.org" <dots@ietf.org>
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Subject: Re: [Dots] (draft-ietf-dots-signal-filter-control) ACL Stats issue
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From: "Jon Shallow" <supjps-ietf@jpshallow.com>
To: "'Konda, Tirumaleswar Reddy'" <TirumaleswarReddy_Konda@mcafee.com>, <mohamed.boucadair@orange.com>, "kaname nishizuka" <kaname@nttv6.jp>, <dots@ietf.org>
References: <787AE7BB302AE849A7480A190F8B93302EA649B4@OPEXCAUBMA2.corporate.adroot.infra.ftgroup> <c3c9614f-908a-c132-cd35-6c627e341f2b@nttv6.jp> <012601d4fb49$3328c000$997a4000$@jpshallow.com> <BYAPR16MB279020119E24ADCB54B339E3EA3D0@BYAPR16MB2790.namprd16.prod.outlook.com> <787AE7BB302AE849A7480A190F8B93302EA6591A@OPEXCAUBMA2.corporate.adroot.infra.ftgroup> <BYAPR16MB27903D8D208FA3AC951FDEE4EA3D0@BYAPR16MB2790.namprd16.prod.outlook.com> <787AE7BB302AE849A7480A190F8B93302EA65AD6@OPEXCAUBMA2.corporate.adroot.infra.ftgroup> <BYAPR16MB279013E8029BE0294293A333EA3D0@BYAPR16MB2790.namprd16.prod.outlook.com> <787AE7BB302AE849A7480A190F8B93302EA6623D@OPEXCAUBMA2.corporate.adroot.infra.ftgroup> <BYAPR16MB2790146175B845622B2EF438EA3E0@BYAPR16MB2790.namprd16.prod.outlook.com> <787AE7BB302AE849A7480A190F8B93302EA6649C@OPEXCAUBMA2.corporate.adroot.infra.ftgroup> <BYAPR16MB27909F467FFE57F380015E94EA3E0@BYAPR16MB2790.namprd16.prod.outlook.com> <787AE7BB302AE849A7480A190F8B93302EA66FEC@OPEXCAUBMA2.c orporate.adroo t.infra.ftgroup> <BYAPR16MB279071FE429E252221521470EA390@BYAPR16MB2790.namprd16.prod.outlook.com> <787AE7BB302AE849A7480A190F8B93302EA67156@OPEXCAUBMA2.corporate.adroot.infra.ftgroup> <BYAPR16MB2790D9396449CF75422C010CEA390@BYAPR16MB2790.namprd16.prod.outlook.com>
In-Reply-To: <BYAPR16MB2790D9396449CF75422C010CEA390@BYAPR16MB2790.namprd16.prod.outlook.com>
Date: Mon, 29 Apr 2019 10:40:33 +0100
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Subject: Re: [Dots] (draft-ietf-dots-signal-filter-control) ACL Stats issue
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Hi,

See inline,

Regards

Jon

> -----Original Message-----
> From: Dots [mailto: dots-bounces@ietf.org] On Behalf Of Konda, =
Tirumaleswar Reddy
> Sent: 29 April 2019 10:22
> To: mohamed.boucadair@orange.com; Jon Shallow; 'kaname nishizuka';
> dots@ietf.org
> Subject: Re: [Dots] (draft-ietf-dots-signal-filter-control) ACL Stats =
issue
>=20
> > -----Original Message-----
> > From: mohamed.boucadair@orange.com
> <mohamed.boucadair@orange.com>
> > Sent: Monday, April 29, 2019 2:46 PM
> > To: Konda, Tirumaleswar Reddy
> <TirumaleswarReddy_Konda@McAfee.com>;
> > Jon Shallow <supjps-ietf@jpshallow.com>; 'kaname nishizuka'
> > <kaname@nttv6.jp>; dots@ietf.org
> > Subject: RE: [Dots] (draft-ietf-dots-signal-filter-control) ACL =
Stats issue
> >
> > This email originated from outside of the organization. Do not click =
links or
> open
> > attachments unless you recognize the sender and know the content is =
safe.
> >
> > (Focusing on this particular point).
> >
> >
> > > -----Message d'origine-----
> > > De : Konda, Tirumaleswar Reddy
> > > [mailto:TirumaleswarReddy_Konda@McAfee.com]
> > > Envoy=C3=A9 : lundi 29 avril 2019 10:52
> > > =C3=80 : BOUCADAIR Mohamed TGI/OLN; Jon Shallow; 'kaname =
nishizuka';
> > > dots@ietf.org Objet : RE: [Dots]
> > > (draft-ietf-dots-signal-filter-control) ACL Stats issue
> > >
> > > > > >
> > > > > >  ACL-specific stats and mitigation stats will give a clear
> > > > > > > picture of the traffic rate-limited, bad traffic dropped =
by
> > > > > > > the DDoS mitigation system, and using these stats the DOTS
> > > > > > > client can heuristically determine the amount of =
legitimate
> > > > > > > traffic dropped because of rate-limit and the impact of =
the attack
> on its
> > service.
> > > > > >
> > > > > > [Med] The impact can be observed locally (e.g., bad QoS,
> > > > > > inability to
> > > > > access a
> > > > > > service, instable connectivity, etc.). I still don=E2=80=99t =
see how
> > > > > > sharing the
> > > > > ACL stats
> > > > > > will be helpful here.
> > > > > >
> > > > > > A DOTS client can preinstall the same rate-limit filter with =
but
> > > > > > with
> > > > > different
> > > > > > policies. It can select the appropriate ACL to
> > > > > > activate/deactivate based on local experience.
> > > > >
> > > > > I don't get how the local experience will help the client pick =
an
> > > > > alternate mitigation provider who can handle the attack scale.
> > > >
> > > > [Med] Modern CPEs include automated features to assess the
> > > > availability of services such as VoIP, IPTV, etc. The DOTS =
client
> > > > can be fed with input
> > > from
> > > > these modules and react accordingly.
> >
> > [Med] s/client/server.

Is this correct?

> >
> > >
> > > I meant the target network cannot infer the amount of legitimate
> > > traffic (or infer the number of users) unable to use its service
> > > because of the rate- limit action.
> > >
> >
> > [Med] The amount of traffic is not required to assess the =
availability of
> > "nominal" services (the example above). What is really important is
> whether
> > some critical services are available. That information can be =
determined
> without
> > needing the ACL stats.
>=20
> I am not referring to "nominal" services or critical resources. For =
instance,
> consider Netflix is not accessible to a large number
> of users because of the rate-limit action.

The DOTS server will have a limited (only because they have to be =
previously defined) set of (possibly inactivated) ACLS on the server.  =
If the "standard" white/black list are unable to bring the inbound pipe =
back to not being flooded, then a (likely global for the DOTS client's =
networks) Rate-Limit ACL must be brought in.  Once the Inbound pipe is =
available, then analysis of the data reaching the DOTs client will show =
the top users which then need their own limiting (black or rate-limit) =
ACL set up over the data channel.  At this point the Rate-Limit ACL can =
removed to see if things are stable again.
[I agree that the CPE may not have this top usage capability]

If Netflix (or similar) has a priority when under attack, then this =
needs to be added into a White ACL which can be done once the inbound =
pipe is not flooded (or be a part of the standard white lists)

~jon

>=20
> -Tiru
>=20
> _______________________________________________
> Dots mailing list
> Dots@ietf.org
> https://www.ietf.org/mailman/listinfo/dots


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From: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>
To: Jon Shallow <supjps-ietf@jpshallow.com>, "mohamed.boucadair@orange.com" <mohamed.boucadair@orange.com>, kaname nishizuka <kaname@nttv6.jp>, "dots@ietf.org" <dots@ietf.org>
Thread-Topic: [Dots] (draft-ietf-dots-signal-filter-control) ACL Stats issue
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Subject: Re: [Dots] (draft-ietf-dots-signal-filter-control) ACL Stats issue
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From: <mohamed.boucadair@orange.com>
To: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>, "Jon Shallow" <supjps-ietf@jpshallow.com>, kaname nishizuka <kaname@nttv6.jp>, "dots@ietf.org" <dots@ietf.org>
Thread-Topic: [Dots] (draft-ietf-dots-signal-filter-control) ACL Stats issue
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Subject: Re: [Dots] (draft-ietf-dots-signal-filter-control) ACL Stats issue
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From: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>
To: "mohamed.boucadair@orange.com" <mohamed.boucadair@orange.com>, Jon Shallow <supjps-ietf@jpshallow.com>, kaname nishizuka <kaname@nttv6.jp>, "dots@ietf.org" <dots@ietf.org>
Thread-Topic: [Dots] (draft-ietf-dots-signal-filter-control) ACL Stats issue
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Archived-At: <https://mailarchive.ietf.org/arch/msg/dots/sloo6j070OikVmXyspZG0So1lyg>
Subject: Re: [Dots] (draft-ietf-dots-signal-filter-control) ACL Stats issue
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From: <mohamed.boucadair@orange.com>
To: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>, "Jon Shallow" <supjps-ietf@jpshallow.com>, kaname nishizuka <kaname@nttv6.jp>, "dots@ietf.org" <dots@ietf.org>
Thread-Topic: [Dots] (draft-ietf-dots-signal-filter-control) ACL Stats issue
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Subject: Re: [Dots] (draft-ietf-dots-signal-filter-control) ACL Stats issue
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From: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>
To: "mohamed.boucadair@orange.com" <mohamed.boucadair@orange.com>, Jon Shallow <supjps-ietf@jpshallow.com>, kaname nishizuka <kaname@nttv6.jp>, "dots@ietf.org" <dots@ietf.org>
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Subject: Re: [Dots] (draft-ietf-dots-signal-filter-control) ACL Stats issue
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To: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>, "mohamed.boucadair@orange.com" <mohamed.boucadair@orange.com>, Jon Shallow <supjps-ietf@jpshallow.com>, "dots@ietf.org" <dots@ietf.org>
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From: kaname nishizuka <kaname@nttv6.jp>
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Subject: Re: [Dots] (draft-ietf-dots-signal-filter-control) ACL Stats issue
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Hi,

 > Looks like a candidate item in a separate DOTS telemetry specification I-D,
rather than restricting it to the filter control case.
I agree with this.
At the usecase(2) that Tiru raised, per ACL traffic counter would be useful but it's not limited to the ACLs activated by signal-filter-control.
"activate-when-mitigating" ACL related information is one of the example. It can be decoupled with the resources created by a signal-filter-control.

I'm in favor of this Jon's comment because it clarifies the original behavior of a signal-filter-control.
 > The DOTS server will have a limited (only because they have to be previously defined) set of (possibly inactivated) ACLS on the server.  If the "standard" white/black list are unable to bring the inbound pipe back to not being flooded, then a (likely global for the DOTS client's networks) Rate-Limit ACL must be brought in.  Once the Inbound pipe is available, then analysis of the data reaching the DOTs client will show the top users which then need their own limiting (black or rate-limit) ACL set up over the data channel.  At this point the Rate-Limit ACL can removed to see if things are stable again.
I'd like to check the new DOTS telemetry specification I-D and see if a reference from the signal-filter-control is needed.

regards,
Kaname


On 2019/04/29 21:58, Konda, Tirumaleswar Reddy wrote:
>> -----Original Message-----
>> From: mohamed.boucadair@orange.com
>> <mohamed.boucadair@orange.com>
>> Sent: Monday, April 29, 2019 6:27 PM
>> To: Konda, Tirumaleswar Reddy
>> <TirumaleswarReddy_Konda@McAfee.com>; Jon Shallow <supjps-
>> ietf@jpshallow.com>; kaname nishizuka <kaname@nttv6.jp>; dots@ietf.org
>> Subject: RE: [Dots] (draft-ietf-dots-signal-filter-control) ACL Stats issue
>>
>> This email originated from outside of the organization. Do not click links or
>> open attachments unless you recognize the sender and know the content is
>> safe.
>>
>> Tiru,
>>
>> Looks like a candidate item in a separate DOTS telemetry specification I-D,
>> rather than restricting it to the filter control case.
>>
>> Hope this is OK with you.
> Yes, works for me.
>
> -Tiru
>
>> Cheers,
>> Med
>>
>>> -----Message d'origine-----
>>> De : Konda, Tirumaleswar Reddy
>>> [mailto:TirumaleswarReddy_Konda@McAfee.com]
>>> Envoyé : lundi 29 avril 2019 14:47
>>> À : BOUCADAIR Mohamed TGI/OLN; Jon Shallow; kaname nishizuka;
>>> dots@ietf.org Objet : RE: [Dots]
>>> (draft-ietf-dots-signal-filter-control) ACL Stats issue
>>>
>>>> -----Original Message-----
>>>> From: mohamed.boucadair@orange.com
>>>> <mohamed.boucadair@orange.com>
>>>> Sent: Monday, April 29, 2019 5:05 PM
>>>> To: Konda, Tirumaleswar Reddy
>>>> <TirumaleswarReddy_Konda@McAfee.com>; Jon Shallow <supjps-
>>>> ietf@jpshallow.com>; kaname nishizuka <kaname@nttv6.jp>;
>>>> dots@ietf.org
>>>> Subject: RE: [Dots] (draft-ietf-dots-signal-filter-control) ACL
>>>> Stats issue
>>>>
>>>> This email originated from outside of the organization. Do not click
>>>> links
>>> or
>>>> open attachments unless you recognize the sender and know the
>>>> content is safe.
>>>>
>>>> Tiru,
>>>>
>>>> I agree that we are approaching the problem with two different use cases:
>>>>
>>>> (1) a client domain with is basically "consuming" services. I do
>>>> still
>>> think this
>>>> use case does not need to learn about the ACL stats.
>>> Yes.
>>>
>>>> (2) your case in which the client domain is "providing" services: I
>>>> still
>>> think
>>>> that the impact on business can be determined also using local
>>>> information (known patterns + rate-limit policy applied by the
>>>> client). If the goal is
>>> to
>>>> decide whether/when an alternate mitigator is to be solicited, this
>>>> can deterministically rely upon "status" set to 4 (Attack has
>>>> exceeded the mitigation provider capacity) or deactivate back the
>>>> rate-limit ACL + local observation. Please remember that local
>>>> observation is needed for efficacy update.
>>> "Attack has exceeded" status message does not convey the details the
>>> traffic rate-limited, and the client needs to understand the attack
>>> scale to figure out suitable alternate mitigation provider.  It is a
>>> critical DOTS telemetry that needs to be conveyed in the signal
>>> channel and cannot be propagated in the data channel during an massive
>> attack.
>>> Cheers,
>>> -Tiru
>>>
>>>> Cheers,
>>>> Med
>>>>
>>>>> -----Message d'origine-----
>>>>> De : Konda, Tirumaleswar Reddy
>>>>> [mailto:TirumaleswarReddy_Konda@McAfee.com]
>>>>> Envoyé : lundi 29 avril 2019 12:18 À : Jon Shallow; BOUCADAIR
>>>>> Mohamed TGI/OLN; kaname nishizuka; dots@ietf.org Objet : RE:
>>>>> [Dots]
>>>>> (draft-ietf-dots-signal-filter-control) ACL Stats issue
>>>>>
>>>>>> -----Original Message-----
>>>>>> From: Jon Shallow <supjps-ietf@jpshallow.com>
>>>>>> Sent: Monday, April 29, 2019 3:11 PM
>>>>>> To: Konda, Tirumaleswar Reddy
>>>>>> <TirumaleswarReddy_Konda@McAfee.com>;
>>>>>> mohamed.boucadair@orange.com; kaname nishizuka
>>>> <kaname@nttv6.jp>;
>>>>>> dots@ietf.org
>>>>>> Subject: RE: [Dots] (draft-ietf-dots-signal-filter-control) ACL
>>>>>> Stats issue
>>>>>>
>>>>>> This email originated from outside of the organization. Do not
>>>>>> click links
>>>>> or
>>>>>> open attachments unless you recognize the sender and know the
>>>>>> content is safe.
>>>>>>
>>>>>> Hi,
>>>>>>
>>>>>> See inline,
>>>>>>
>>>>>> Regards
>>>>>>
>>>>>> Jon
>>>>>>
>>>>>>> -----Original Message-----
>>>>>>> From: Dots [mailto: dots-bounces@ietf.org] On Behalf Of Konda,
>>>>>>> Tirumaleswar Reddy
>>>>>>> Sent: 29 April 2019 10:22
>>>>>>> To: mohamed.boucadair@orange.com; Jon Shallow; 'kaname
>>>>>>> nishizuka'; dots@ietf.org
>>>>>>> Subject: Re: [Dots] (draft-ietf-dots-signal-filter-control)
>>>>>>> ACL Stats issue
>>>>>>>
>>>>>>>> -----Original Message-----
>>>>>>>> From: mohamed.boucadair@orange.com
>>>>>>> <mohamed.boucadair@orange.com>
>>>>>>>> Sent: Monday, April 29, 2019 2:46 PM
>>>>>>>> To: Konda, Tirumaleswar Reddy
>>>>>>> <TirumaleswarReddy_Konda@McAfee.com>;
>>>>>>>> Jon Shallow <supjps-ietf@jpshallow.com>; 'kaname nishizuka'
>>>>>>>> <kaname@nttv6.jp>; dots@ietf.org
>>>>>>>> Subject: RE: [Dots] (draft-ietf-dots-signal-filter-control)
>>>>>>>> ACL Stats issue
>>>>>>>>
>>>>>>>> This email originated from outside of the organization. Do
>>>>>>>> not click links or
>>>>>>> open
>>>>>>>> attachments unless you recognize the sender and know the
>>>>>>>> content is
>>>>>> safe.
>>>>>>>> (Focusing on this particular point).
>>>>>>>>
>>>>>>>>
>>>>>>>>> -----Message d'origine----- De : Konda, Tirumaleswar Reddy
>>>>>>>>> [mailto:TirumaleswarReddy_Konda@McAfee.com]
>>>>>>>>> Envoyé : lundi 29 avril 2019 10:52 À : BOUCADAIR Mohamed
>>>>>>>>> TGI/OLN; Jon Shallow; 'kaname nishizuka'; dots@ietf.org
>>>>>>>>> Objet
>>>>>>>>> : RE: [Dots]
>>>>>>>>> (draft-ietf-dots-signal-filter-control) ACL Stats issue
>>>>>>>>>
>>>>>>>>>>>>   ACL-specific stats and mitigation stats will give a
>>>>>>>>>>>> clear
>>>>>>>>>>>>> picture of the traffic rate-limited, bad traffic
>>>>>>>>>>>>> dropped by the DDoS mitigation system, and using
>>>>>>>>>>>>> these stats the DOTS client can heuristically
>>>>>>>>>>>>> determine the amount of legitimate traffic dropped
>>>>>>>>>>>>> because of rate-limit and the impact of the attack
>>>>>>> on its
>>>>>>>> service.
>>>>>>>>>>>> [Med] The impact can be observed locally (e.g., bad
>>>>>>>>>>>> QoS, inability to
>>>>>>>>>>> access a
>>>>>>>>>>>> service, instable connectivity, etc.). I still don’t
>>>>>>>>>>>> see how sharing the
>>>>>>>>>>> ACL stats
>>>>>>>>>>>> will be helpful here.
>>>>>>>>>>>>
>>>>>>>>>>>> A DOTS client can preinstall the same rate-limit
>>>>>>>>>>>> filter with but with
>>>>>>>>>>> different
>>>>>>>>>>>> policies. It can select the appropriate ACL to
>>>>>>>>>>>> activate/deactivate based on local experience.
>>>>>>>>>>> I don't get how the local experience will help the
>>>>>>>>>>> client pick an alternate mitigation provider who can
>>>>>>>>>>> handle the
>>> attack
>>>> scale.
>>>>>>>>>> [Med] Modern CPEs include automated features to assess
>>>>>>>>>> the availability of services such as VoIP, IPTV, etc.
>>>>>>>>>> The DOTS client can be fed with input
>>>>>>>>> from
>>>>>>>>>> these modules and react accordingly.
>>>>>>>> [Med] s/client/server.
>>>>>> Is this correct?
>>>>>>
>>>>>>>>> I meant the target network cannot infer the amount of
>>>>>>>>> legitimate traffic (or infer the number of users) unable
>>>>>>>>> to use its service because of the rate- limit action.
>>>>>>>>>
>>>>>>>> [Med] The amount of traffic is not required to assess the
>>>>>>>> availability of "nominal" services (the example above). What
>>>>>>>> is really important is
>>>>>>> whether
>>>>>>>> some critical services are available. That information can
>>>>>>>> be determined
>>>>>>> without
>>>>>>>> needing the ACL stats.
>>>>>>> I am not referring to "nominal" services or critical resources.
>>>>>>> For instance, consider Netflix is not accessible to a large
>>>>>>> number of users because of the rate-limit action.
>>>>>> The DOTS server will have a limited (only because they have to
>>>>>> be
>>>>> previously
>>>>>> defined) set of (possibly inactivated) ACLS on the server.  If
>>>>>> the
>>>>> "standard"
>>>>>> white/black list are unable to bring the inbound pipe back to
>>>>>> not being flooded, then a (likely global for the DOTS client's
>>>>>> networks) Rate-Limit
>>>>> ACL
>>>>>> must be brought in.  Once the Inbound pipe is available, then
>>>>>> analysis of
>>>>> the
>>>>>> data reaching the DOTs client will show the top users which then
>>>>>> need their own limiting (black or rate-limit) ACL set up over
>>>>>> the data channel.  At
>>>>> this
>>>>>> point the Rate-Limit ACL can removed to see if things are stable again.
>>>>>> [I agree that the CPE may not have this top usage capability]
>>>>>>
>>>>>> If Netflix (or similar) has a priority when under attack, then
>>>>>> this needs
>>>>> to be
>>>>>> added into a White ACL which can be done once the inbound pipe
>>>>>> is not flooded (or be a part of the standard white lists)
>>>>> I think we are discussing two different use cases. My attack use
>>>>> case is Netflix content provider is under volumetric DDoS attack,
>>>>> and if the rate- limit ACL is configured using the DOTS signal
>>>>> channel because the DDoS mitigation provider cannot handle all the
>>>>> attack traffic. The rate-limit ACL stats will help Netflix
>>>>> understand the scale of the attack, impact on the current business
>>>>> because of the rate-limit action (e.g. based on the amount of
>>>>> traffic dropped by DMS, infer the amount of good traffic dropped
>>>>> by the rate-limit ACL action, and infer the number of users who
>>>>> cannot access its service), and if the attack lasts for  several
>>>>> days/weeks help identify an alternate mitigation provider capable
>>>>> of handling the attack (e.g. Krebs was initially using Akamai and
>>>>> eventually got protected by Google to handle
>>> the
>>>> massive attack).
>>>>> Cheers,
>>>>> -Tiru
>>>>>
>>>>>> ~jon
>>>>>>
>>>>>>> -Tiru
>>>>>>>
>>>>>>> _______________________________________________
>>>>>>> Dots mailing list
>>>>>>> Dots@ietf.org
>>>>>>> https://www.ietf.org/mailman/listinfo/dots


From nobody Tue Apr 30 10:20:54 2019
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From: Roman Danyliw via Datatracker <noreply@ietf.org>
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Cc: draft-ietf-dots-signal-channel@ietf.org, Liang Xia <frank.xialiang@huawei.com>, dots-chairs@ietf.org, frank.xialiang@huawei.com, dots@ietf.org
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Subject: [Dots] Roman Danyliw's No Objection on draft-ietf-dots-signal-channel-31: (with COMMENT)
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Roman Danyliw has entered the following ballot position for
draft-ietf-dots-signal-channel-31: No Objection

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The document, along with other ballot positions, can be found here:
https://datatracker.ietf.org/doc/draft-ietf-dots-signal-channel/



----------------------------------------------------------------------
COMMENT:
----------------------------------------------------------------------

A few minor items:

(1) Typos:

Section 3: s/signalling/signaling/
Section 4.4.1: s/implictily/implicitly/

(2) Section 7.1, Per “The DOTS client additionally uses [RFC6125] validation
techniques to compare the domain name with the certificate provided”, this
sentence appears to be missing a RFC2119 word – should it read something like
“Additionally, the DOTS client MUST use [RFC6125] validation …”?



From nobody Tue Apr 30 20:06:58 2019
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From: Suresh Krishnan via Datatracker <noreply@ietf.org>
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Cc: draft-ietf-dots-signal-channel@ietf.org, Liang Xia <frank.xialiang@huawei.com>, dots-chairs@ietf.org, frank.xialiang@huawei.com, dots@ietf.org
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Subject: [Dots] Suresh Krishnan's Discuss on draft-ietf-dots-signal-channel-31: (with DISCUSS and COMMENT)
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Suresh Krishnan has entered the following ballot position for
draft-ietf-dots-signal-channel-31: Discuss

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https://datatracker.ietf.org/doc/draft-ietf-dots-signal-channel/



----------------------------------------------------------------------
DISCUSS:
----------------------------------------------------------------------

This should be easy to clear up, but I would like to understand why this
document needs to restate the motivation and describe the algorithm for happy
eyeballs instead of simply stating that hosts should use RFC8305 and then
specify that UDP must be tried before TCP in each of the address families. If
you do want to specify the whole algorithm here it needs to be more specific
than "in a manner similar to the Happy Eyeballs mechanism" as it is not clear
where it is similar (and where it will differ). It also looks like the example
flow in Figure 4 is not consistent with the description before (TCP+IPv6 before
UDP+IPv4)


----------------------------------------------------------------------
COMMENT:
----------------------------------------------------------------------

* Section 7.3

This text is wrong and needs to be removed

"IP packets whose size does not exceed 576 bytes should never need to be fragmented"

RFC791 only requires all hosts to be prepared to accept datagrams of up to 576 octets.



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From: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>
To: Roman Danyliw <rdd@cert.org>, The IESG <iesg@ietf.org>
CC: "draft-ietf-dots-signal-channel@ietf.org" <draft-ietf-dots-signal-channel@ietf.org>, "frank.xialiang@huawei.com" <frank.xialiang@huawei.com>, "dots@ietf.org" <dots@ietf.org>, "dots-chairs@ietf.org" <dots-chairs@ietf.org>
Thread-Topic: [Dots] Roman Danyliw's No Objection on draft-ietf-dots-signal-channel-31: (with COMMENT)
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Subject: Re: [Dots] Roman Danyliw's No Objection on draft-ietf-dots-signal-channel-31: (with COMMENT)
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